You are a helpful assistant. The assistant first thinks about the reasoning process in the mind and then provides the user with the answer. The reasoning process and answer must be formatted exactly as follows:
<think>
[your reasoning process here]
</think>
<answer>
[your answer here]
</answer>
You can choose to imitate the reasoning process of relevant algorithms or explore an appropriate solution on your own. DO NOT use code, and remember to focus on the logical flow.
system
Your task is to find the common neighbors of two nodes in an undirected academic network. In this network, nodes represent authors and edges represent research collaborations.

**Problem to Solve**

- Authors in the network: I. Pérez, Sergio Alonso, Francisco Javier Cabrerizo, Enrique Herrera-Viedma, Eduardo Peis, Alexandrin Popescul, George Karypis, Juan Bernabé-Moreno, Álvaro Tejeda-Lorente, Carlos Porcel, Antonio Gabriel López-Herrera, James A. Hendler, Chen-Tung Chen, Juan Antonio Morente-Molinera, Lyle H. Ungar, Francisco Herrera, John Riedl, Zeshui Xu, Joseph A. Konstan, Francisco Chiclana
- Research collaborations between these authors: I. Pérez and Francisco Herrera, I. Pérez and Sergio Alonso, I. Pérez and Francisco Javier Cabrerizo, I. Pérez and Enrique Herrera-Viedma, I. Pérez and Francisco Chiclana, I. Pérez and Juan Antonio Morente-Molinera, I. Pérez and Álvaro Tejeda-Lorente, I. Pérez and Carlos Porcel, I. Pérez and Antonio Gabriel López-Herrera, I. Pérez and Zeshui Xu, I. Pérez and Eduardo Peis, I. Pérez and Juan Bernabé-Moreno, Sergio Alonso and Francisco Herrera, Sergio Alonso and Francisco Javier Cabrerizo, Sergio Alonso and Enrique Herrera-Viedma, Sergio Alonso and Francisco Chiclana, Sergio Alonso and Carlos Porcel, Sergio Alonso and Antonio Gabriel López-Herrera, Sergio Alonso and Zeshui Xu, Sergio Alonso and Eduardo Peis, Sergio Alonso and Juan Antonio Morente-Molinera, Sergio Alonso and Álvaro Tejeda-Lorente, Sergio Alonso and Juan Bernabé-Moreno, Francisco Javier Cabrerizo and Francisco Herrera, Francisco Javier Cabrerizo and Enrique Herrera-Viedma, Francisco Javier Cabrerizo and Francisco Chiclana, Francisco Javier Cabrerizo and Juan Antonio Morente-Molinera, Francisco Javier Cabrerizo and Álvaro Tejeda-Lorente, Francisco Javier Cabrerizo and Carlos Porcel, Francisco Javier Cabrerizo and Antonio Gabriel López-Herrera, Francisco Javier Cabrerizo and Zeshui Xu, Francisco Javier Cabrerizo and Eduardo Peis, Francisco Javier Cabrerizo and Juan Bernabé-Moreno, Enrique Herrera-Viedma and Francisco Herrera, Enrique Herrera-Viedma and George Karypis, Enrique Herrera-Viedma and Lyle H. Ungar, Enrique Herrera-Viedma and James A. Hendler, Enrique Herrera-Viedma and Francisco Chiclana, Enrique Herrera-Viedma and John Riedl, Enrique Herrera-Viedma and Joseph A. Konstan, Enrique Herrera-Viedma and Juan Antonio Morente-Molinera, Enrique Herrera-Viedma and Álvaro Tejeda-Lorente, Enrique Herrera-Viedma and Carlos Porcel, Enrique Herrera-Viedma and Antonio Gabriel López-Herrera, Enrique Herrera-Viedma and Zeshui Xu, Enrique Herrera-Viedma and Eduardo Peis, Enrique Herrera-Viedma and Juan Bernabé-Moreno, Enrique Herrera-Viedma and Alexandrin Popescul, Enrique Herrera-Viedma and Chen-Tung Chen, Eduardo Peis and Chen-Tung Chen, Eduardo Peis and Juan Antonio Morente-Molinera, Eduardo Peis and Álvaro Tejeda-Lorente, Eduardo Peis and Carlos Porcel, Eduardo Peis and Antonio Gabriel López-Herrera, Eduardo Peis and George Karypis, Eduardo Peis and Francisco Herrera, Eduardo Peis and Lyle H. Ungar, Eduardo Peis and James A. Hendler, Eduardo Peis and Francisco Chiclana, Eduardo Peis and John Riedl, Eduardo Peis and Joseph A. Konstan, Eduardo Peis and Alexandrin Popescul, Eduardo Peis and Juan Bernabé-Moreno, Alexandrin Popescul and Lyle H. Ungar, Alexandrin Popescul and Joseph A. Konstan, Alexandrin Popescul and Carlos Porcel, Alexandrin Popescul and Antonio Gabriel López-Herrera, George Karypis and John Riedl, George Karypis and Joseph A. Konstan, George Karypis and Álvaro Tejeda-Lorente, George Karypis and Carlos Porcel, Juan Bernabé-Moreno and Francisco Herrera, Juan Bernabé-Moreno and Francisco Chiclana, Juan Bernabé-Moreno and Álvaro Tejeda-Lorente, Juan Bernabé-Moreno and Carlos Porcel, Álvaro Tejeda-Lorente and Juan Antonio Morente-Molinera, Álvaro Tejeda-Lorente and Francisco Herrera, Álvaro Tejeda-Lorente and Francisco Chiclana, Álvaro Tejeda-Lorente and John Riedl, Álvaro Tejeda-Lorente and Joseph A. Konstan, Álvaro Tejeda-Lorente and Carlos Porcel, Álvaro Tejeda-Lorente and Antonio Gabriel López-Herrera, Carlos Porcel and Francisco Herrera, Carlos Porcel and Francisco Chiclana, Carlos Porcel and Juan Antonio Morente-Molinera, Carlos Porcel and Lyle H. Ungar, Carlos Porcel and John Riedl, Carlos Porcel and Joseph A. Konstan, Carlos Porcel and Antonio Gabriel López-Herrera, Carlos Porcel and Zeshui Xu, Antonio Gabriel López-Herrera and Francisco Herrera, Antonio Gabriel López-Herrera and Francisco Chiclana, Antonio Gabriel López-Herrera and Lyle H. Ungar, Antonio Gabriel López-Herrera and Zeshui Xu, James A. Hendler and John Riedl, James A. Hendler and Joseph A. Konstan, Chen-Tung Chen and Francisco Herrera, Chen-Tung Chen and Zeshui Xu, Juan Antonio Morente-Molinera and Francisco Chiclana, Juan Antonio Morente-Molinera and Francisco Herrera, Juan Antonio Morente-Molinera and Zeshui Xu, Lyle H. Ungar and Francisco Herrera, Lyle H. Ungar and Joseph A. Konstan, Francisco Herrera and Francisco Chiclana, Francisco Herrera and Zeshui Xu, John Riedl and Joseph A. Konstan, Zeshui Xu and Francisco Chiclana.
Please identify the common neighbors of I. Pérez and Sergio Alonso in this network.
Present your answer in the following format: [AuthorA, AuthorB, AuthorC, AuthorD, ...].
user
{"directed": false, "multigraph": false, "graph": {}, "nodes": [{"name": "I. P\u00e9rez", "id": 17679}, {"name": "Sergio Alonso", "id": 17680}, {"name": "Francisco Javier Cabrerizo", "id": 17681}, {"name": "Enrique Herrera-Viedma", "id": 17683}, {"name": "Eduardo Peis", "id": 166035}, {"name": "Alexandrin Popescul", "id": 426414}, {"name": "George Karypis", "id": 2866}, {"name": "Juan Bernab\u00e9-Moreno", "id": 205754}, {"name": "\u00c1lvaro Tejeda-Lorente", "id": 125892}, {"name": "Carlos Porcel", "id": 125893}, {"name": "Antonio Gabriel L\u00f3pez-Herrera", "id": 135493}, {"name": "James A. Hendler", "id": 11339}, {"name": "Chen-Tung Chen", "id": 106960}, {"name": "Juan Antonio Morente-Molinera", "id": 119891}, {"name": "Lyle H. Ungar", "id": 8916}, {"name": "Francisco Herrera", "id": 8676}, {"name": "John Riedl", "id": 100972}, {"name": "Zeshui Xu", "id": 159853}, {"name": "Joseph A. Konstan", "id": 113270}, {"name": "Francisco Chiclana", "id": 38910}], "links": [{"source": 17679, "target": 8676}, {"source": 17679, "target": 17680}, {"source": 17679, "target": 17681}, {"source": 17679, "target": 17683}, {"source": 17679, "target": 38910}, {"source": 17679, "target": 119891}, {"source": 17679, "target": 125892}, {"source": 17679, "target": 125893}, {"source": 17679, "target": 135493}, {"source": 17679, "target": 159853}, {"source": 17679, "target": 166035}, {"source": 17679, "target": 205754}, {"source": 17680, "target": 8676}, {"source": 17680, "target": 17681}, {"source": 17680, "target": 17683}, {"source": 17680, "target": 38910}, {"source": 17680, "target": 125893}, {"source": 17680, "target": 135493}, {"source": 17680, "target": 159853}, {"source": 17680, "target": 166035}, {"source": 17680, "target": 119891}, {"source": 17680, "target": 125892}, {"source": 17680, "target": 205754}, {"source": 17681, "target": 8676}, {"source": 17681, "target": 17683}, {"source": 17681, "target": 38910}, {"source": 17681, "target": 119891}, {"source": 17681, "target": 125892}, {"source": 17681, "target": 125893}, {"source": 17681, "target": 135493}, {"source": 17681, "target": 159853}, {"source": 17681, "target": 166035}, {"source": 17681, "target": 205754}, {"source": 17683, "target": 8676}, {"source": 17683, "target": 2866}, {"source": 17683, "target": 8916}, {"source": 17683, "target": 11339}, {"source": 17683, "target": 38910}, {"source": 17683, "target": 100972}, {"source": 17683, "target": 113270}, {"source": 17683, "target": 119891}, {"source": 17683, "target": 125892}, {"source": 17683, "target": 125893}, {"source": 17683, "target": 135493}, {"source": 17683, "target": 159853}, {"source": 17683, "target": 166035}, {"source": 17683, "target": 205754}, {"source": 17683, "target": 426414}, {"source": 17683, "target": 106960}, {"source": 166035, "target": 106960}, {"source": 166035, "target": 119891}, {"source": 166035, "target": 125892}, {"source": 166035, "target": 125893}, {"source": 166035, "target": 135493}, {"source": 166035, "target": 2866}, {"source": 166035, "target": 8676}, {"source": 166035, "target": 8916}, {"source": 166035, "target": 11339}, {"source": 166035, "target": 38910}, {"source": 166035, "target": 100972}, {"source": 166035, "target": 113270}, {"source": 166035, "target": 426414}, {"source": 166035, "target": 205754}, {"source": 426414, "target": 8916}, {"source": 426414, "target": 113270}, {"source": 426414, "target": 125893}, {"source": 426414, "target": 135493}, {"source": 2866, "target": 100972}, {"source": 2866, "target": 113270}, {"source": 2866, "target": 125892}, {"source": 2866, "target": 125893}, {"source": 205754, "target": 8676}, {"source": 205754, "target": 38910}, {"source": 205754, "target": 125892}, {"source": 205754, "target": 125893}, {"source": 125892, "target": 119891}, {"source": 125892, "target": 8676}, {"source": 125892, "target": 38910}, {"source": 125892, "target": 100972}, {"source": 125892, "target": 113270}, {"source": 125892, "target": 125893}, {"source": 125892, "target": 135493}, {"source": 125893, "target": 8676}, {"source": 125893, "target": 38910}, {"source": 125893, "target": 119891}, {"source": 125893, "target": 8916}, {"source": 125893, "target": 100972}, {"source": 125893, "target": 113270}, {"source": 125893, "target": 135493}, {"source": 125893, "target": 159853}, {"source": 135493, "target": 8676}, {"source": 135493, "target": 38910}, {"source": 135493, "target": 8916}, {"source": 135493, "target": 159853}, {"source": 11339, "target": 100972}, {"source": 11339, "target": 113270}, {"source": 106960, "target": 8676}, {"source": 106960, "target": 159853}, {"source": 119891, "target": 38910}, {"source": 119891, "target": 8676}, {"source": 119891, "target": 159853}, {"source": 8916, "target": 8676}, {"source": 8916, "target": 113270}, {"source": 8676, "target": 38910}, {"source": 8676, "target": 159853}, {"source": 100972, "target": 113270}, {"source": 159853, "target": 38910}]}
Your task is to find the common neighbors of two nodes in an undirected academic network. In this network, nodes represent authors and edges represent research collaborations.

**Problem to Solve**

- Authors in the network: I. Pérez, Sergio Alonso, Francisco Javier Cabrerizo, Enrique Herrera-Viedma, Eduardo Peis, Alexandrin Popescul, George Karypis, Juan Bernabé-Moreno, Álvaro Tejeda-Lorente, Carlos Porcel, Antonio Gabriel López-Herrera, James A. Hendler, Chen-Tung Chen, Juan Antonio Morente-Molinera, Lyle H. Ungar, Francisco Herrera, John Riedl, Zeshui Xu, Joseph A. Konstan, Francisco Chiclana
- Research collaborations between these authors: I. Pérez and Francisco Herrera, I. Pérez and Sergio Alonso, I. Pérez and Francisco Javier Cabrerizo, I. Pérez and Enrique Herrera-Viedma, I. Pérez and Francisco Chiclana, I. Pérez and Juan Antonio Morente-Molinera, I. Pérez and Álvaro Tejeda-Lorente, I. Pérez and Carlos Porcel, I. Pérez and Antonio Gabriel López-Herrera, I. Pérez and Zeshui Xu, I. Pérez and Eduardo Peis, I. Pérez and Juan Bernabé-Moreno, Sergio Alonso and Francisco Herrera, Sergio Alonso and Francisco Javier Cabrerizo, Sergio Alonso and Enrique Herrera-Viedma, Sergio Alonso and Francisco Chiclana, Sergio Alonso and Carlos Porcel, Sergio Alonso and Antonio Gabriel López-Herrera, Sergio Alonso and Zeshui Xu, Sergio Alonso and Eduardo Peis, Sergio Alonso and Juan Antonio Morente-Molinera, Sergio Alonso and Álvaro Tejeda-Lorente, Sergio Alonso and Juan Bernabé-Moreno, Francisco Javier Cabrerizo and Francisco Herrera, Francisco Javier Cabrerizo and Enrique Herrera-Viedma, Francisco Javier Cabrerizo and Francisco Chiclana, Francisco Javier Cabrerizo and Juan Antonio Morente-Molinera, Francisco Javier Cabrerizo and Álvaro Tejeda-Lorente, Francisco Javier Cabrerizo and Carlos Porcel, Francisco Javier Cabrerizo and Antonio Gabriel López-Herrera, Francisco Javier Cabrerizo and Zeshui Xu, Francisco Javier Cabrerizo and Eduardo Peis, Francisco Javier Cabrerizo and Juan Bernabé-Moreno, Enrique Herrera-Viedma and Francisco Herrera, Enrique Herrera-Viedma and George Karypis, Enrique Herrera-Viedma and Lyle H. Ungar, Enrique Herrera-Viedma and James A. Hendler, Enrique Herrera-Viedma and Francisco Chiclana, Enrique Herrera-Viedma and John Riedl, Enrique Herrera-Viedma and Joseph A. Konstan, Enrique Herrera-Viedma and Juan Antonio Morente-Molinera, Enrique Herrera-Viedma and Álvaro Tejeda-Lorente, Enrique Herrera-Viedma and Carlos Porcel, Enrique Herrera-Viedma and Antonio Gabriel López-Herrera, Enrique Herrera-Viedma and Zeshui Xu, Enrique Herrera-Viedma and Eduardo Peis, Enrique Herrera-Viedma and Juan Bernabé-Moreno, Enrique Herrera-Viedma and Alexandrin Popescul, Enrique Herrera-Viedma and Chen-Tung Chen, Eduardo Peis and Chen-Tung Chen, Eduardo Peis and Juan Antonio Morente-Molinera, Eduardo Peis and Álvaro Tejeda-Lorente, Eduardo Peis and Carlos Porcel, Eduardo Peis and Antonio Gabriel López-Herrera, Eduardo Peis and George Karypis, Eduardo Peis and Francisco Herrera, Eduardo Peis and Lyle H. Ungar, Eduardo Peis and James A. Hendler, Eduardo Peis and Francisco Chiclana, Eduardo Peis and John Riedl, Eduardo Peis and Joseph A. Konstan, Eduardo Peis and Alexandrin Popescul, Eduardo Peis and Juan Bernabé-Moreno, Alexandrin Popescul and Lyle H. Ungar, Alexandrin Popescul and Joseph A. Konstan, Alexandrin Popescul and Carlos Porcel, Alexandrin Popescul and Antonio Gabriel López-Herrera, George Karypis and John Riedl, George Karypis and Joseph A. Konstan, George Karypis and Álvaro Tejeda-Lorente, George Karypis and Carlos Porcel, Juan Bernabé-Moreno and Francisco Herrera, Juan Bernabé-Moreno and Francisco Chiclana, Juan Bernabé-Moreno and Álvaro Tejeda-Lorente, Juan Bernabé-Moreno and Carlos Porcel, Álvaro Tejeda-Lorente and Juan Antonio Morente-Molinera, Álvaro Tejeda-Lorente and Francisco Herrera, Álvaro Tejeda-Lorente and Francisco Chiclana, Álvaro Tejeda-Lorente and John Riedl, Álvaro Tejeda-Lorente and Joseph A. Konstan, Álvaro Tejeda-Lorente and Carlos Porcel, Álvaro Tejeda-Lorente and Antonio Gabriel López-Herrera, Carlos Porcel and Francisco Herrera, Carlos Porcel and Francisco Chiclana, Carlos Porcel and Juan Antonio Morente-Molinera, Carlos Porcel and Lyle H. Ungar, Carlos Porcel and John Riedl, Carlos Porcel and Joseph A. Konstan, Carlos Porcel and Antonio Gabriel López-Herrera, Carlos Porcel and Zeshui Xu, Antonio Gabriel López-Herrera and Francisco Herrera, Antonio Gabriel López-Herrera and Francisco Chiclana, Antonio Gabriel López-Herrera and Lyle H. Ungar, Antonio Gabriel López-Herrera and Zeshui Xu, James A. Hendler and John Riedl, James A. Hendler and Joseph A. Konstan, Chen-Tung Chen and Francisco Herrera, Chen-Tung Chen and Zeshui Xu, Juan Antonio Morente-Molinera and Francisco Chiclana, Juan Antonio Morente-Molinera and Francisco Herrera, Juan Antonio Morente-Molinera and Zeshui Xu, Lyle H. Ungar and Francisco Herrera, Lyle H. Ungar and Joseph A. Konstan, Francisco Herrera and Francisco Chiclana, Francisco Herrera and Zeshui Xu, John Riedl and Joseph A. Konstan, Zeshui Xu and Francisco Chiclana.
Please identify the common neighbors of I. Pérez and Sergio Alonso in this network.
Present your answer in the following format: [AuthorA, AuthorB, AuthorC, AuthorD, ...].
test