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: Zheng Zhang, Xiaoliang Zhao, Marcelo Pias, Sem C. Borst, Eric Keller, Steve Uhlig, Anna Sperotto, Dejan Kostic, Mohit Lad, Olaf Maennel, Victor C. M. Leung, Ravish Khosla, Sung-Hwa Lim, M. Frans Kaashoek, Jianping Wu, Eric Osterweil, Daniel Massey, David S. Touretzky, Lixia Zhang, Dan Pei, Alessio Campisano, Thomas Engel, Jennifer Rexford, Pierre-Antoine Vervier, Sonia Fahmy, Y. Charlie Hu, Nick Feamster
- Research collaborations between these authors: Zheng Zhang and Y. Charlie Hu, Zheng Zhang and Jianping Wu, Zheng Zhang and Nick Feamster, Zheng Zhang and Daniel Massey, Zheng Zhang and Lixia Zhang, Zheng Zhang and M. Frans Kaashoek, Zheng Zhang and Jennifer Rexford, Zheng Zhang and Dan Pei, Zheng Zhang and Mohit Lad, Zheng Zhang and Dejan Kostic, Zheng Zhang and Pierre-Antoine Vervier, Xiaoliang Zhao and Daniel Massey, Xiaoliang Zhao and Lixia Zhang, Xiaoliang Zhao and Nick Feamster, Xiaoliang Zhao and Jennifer Rexford, Xiaoliang Zhao and Dan Pei, Xiaoliang Zhao and Sonia Fahmy, Xiaoliang Zhao and Mohit Lad, Marcelo Pias and M. Frans Kaashoek, Marcelo Pias and Sonia Fahmy, Sem C. Borst and Victor C. M. Leung, Eric Keller and Steve Uhlig, Eric Keller and Nick Feamster, Eric Keller and M. Frans Kaashoek, Eric Keller and Jennifer Rexford, Steve Uhlig and Lixia Zhang, Steve Uhlig and Nick Feamster, Steve Uhlig and Daniel Massey, Steve Uhlig and Olaf Maennel, Steve Uhlig and M. Frans Kaashoek, Steve Uhlig and Jennifer Rexford, Steve Uhlig and Dan Pei, Steve Uhlig and Dejan Kostic, Steve Uhlig and Mohit Lad, Anna Sperotto and Thomas Engel, Anna Sperotto and Eric Osterweil, Anna Sperotto and Daniel Massey, Anna Sperotto and Lixia Zhang, Anna Sperotto and Nick Feamster, Dejan Kostic and Jianping Wu, Dejan Kostic and M. Frans Kaashoek, Dejan Kostic and Jennifer Rexford, Mohit Lad and Daniel Massey, Mohit Lad and Lixia Zhang, Mohit Lad and Y. Charlie Hu, Mohit Lad and Jianping Wu, Mohit Lad and Nick Feamster, Mohit Lad and Olaf Maennel, Mohit Lad and Jennifer Rexford, Mohit Lad and Dan Pei, Mohit Lad and Sonia Fahmy, Mohit Lad and Alessio Campisano, Mohit Lad and Pierre-Antoine Vervier, Mohit Lad and Ravish Khosla, Olaf Maennel and Daniel Massey, Olaf Maennel and Lixia Zhang, Olaf Maennel and Y. Charlie Hu, Olaf Maennel and Nick Feamster, Olaf Maennel and Jennifer Rexford, Olaf Maennel and Dan Pei, Olaf Maennel and Sonia Fahmy, Olaf Maennel and Ravish Khosla, Victor C. M. Leung and Lixia Zhang, Victor C. M. Leung and Y. Charlie Hu, Victor C. M. Leung and M. Frans Kaashoek, Victor C. M. Leung and Jennifer Rexford, Ravish Khosla and Daniel Massey, Ravish Khosla and Lixia Zhang, Ravish Khosla and Jennifer Rexford, M. Frans Kaashoek and Thomas Engel, M. Frans Kaashoek and Daniel Massey, M. Frans Kaashoek and Lixia Zhang, M. Frans Kaashoek and Y. Charlie Hu, M. Frans Kaashoek and Jianping Wu, M. Frans Kaashoek and Nick Feamster, M. Frans Kaashoek and Jennifer Rexford, M. Frans Kaashoek and Sonia Fahmy, Jianping Wu and Daniel Massey, Jianping Wu and Lixia Zhang, Jianping Wu and Y. Charlie Hu, Jianping Wu and Nick Feamster, Jianping Wu and Jennifer Rexford, Jianping Wu and Dan Pei, Jianping Wu and Sonia Fahmy, Eric Osterweil and Daniel Massey, Eric Osterweil and Lixia Zhang, Daniel Massey and Lixia Zhang, Daniel Massey and Nick Feamster, Daniel Massey and Jennifer Rexford, Daniel Massey and Dan Pei, Daniel Massey and Y. Charlie Hu, Daniel Massey and Sonia Fahmy, Daniel Massey and Alessio Campisano, Daniel Massey and Pierre-Antoine Vervier, Lixia Zhang and Thomas Engel, Lixia Zhang and Nick Feamster, Lixia Zhang and Jennifer Rexford, Lixia Zhang and Dan Pei, Lixia Zhang and Y. Charlie Hu, Lixia Zhang and Sonia Fahmy, Lixia Zhang and Alessio Campisano, Lixia Zhang and Pierre-Antoine Vervier, Dan Pei and Thomas Engel, Dan Pei and Y. Charlie Hu, Dan Pei and Nick Feamster, Dan Pei and Jennifer Rexford, Dan Pei and Sonia Fahmy, Dan Pei and Pierre-Antoine Vervier, Thomas Engel and Nick Feamster, Thomas Engel and Jennifer Rexford, Jennifer Rexford and Y. Charlie Hu, Jennifer Rexford and Nick Feamster, Jennifer Rexford and Sonia Fahmy, Pierre-Antoine Vervier and Y. Charlie Hu, Pierre-Antoine Vervier and Nick Feamster, Sonia Fahmy and Y. Charlie Hu, Sonia Fahmy and Nick Feamster, Y. Charlie Hu and Nick Feamster.
Please identify the common neighbors of Zheng Zhang and Xiaoliang Zhao in this network.
Present your answer in the following format: [AuthorA, AuthorB, AuthorC, AuthorD, ...].
user
{"directed": false, "multigraph": false, "graph": {}, "nodes": [{"name": "Zheng Zhang", "id": 106382}, {"name": "Xiaoliang Zhao", "id": 257426}, {"name": "Marcelo Pias", "id": 76693}, {"name": "Sem C. Borst", "id": 89365}, {"name": "Eric Keller", "id": 126359}, {"name": "Steve Uhlig", "id": 88731}, {"name": "Anna Sperotto", "id": 137886}, {"name": "Dejan Kostic", "id": 283681}, {"name": "Mohit Lad", "id": 333741}, {"name": "Olaf Maennel", "id": 107056}, {"name": "Victor C. M. Leung", "id": 36657}, {"name": "Ravish Khosla", "id": 852404}, {"name": "Sung-Hwa Lim", "id": 521527}, {"name": "M. Frans Kaashoek", "id": 117312}, {"name": "Jianping Wu", "id": 33858}, {"name": "Eric Osterweil", "id": 9541}, {"name": "Daniel Massey", "id": 9542}, {"name": "David S. Touretzky", "id": 123334}, {"name": "Lixia Zhang", "id": 9545}, {"name": "Dan Pei", "id": 145225}, {"name": "Alessio Campisano", "id": 450129}, {"name": "Thomas Engel", "id": 5970}, {"name": "Jennifer Rexford", "id": 131285}, {"name": "Pierre-Antoine Vervier", "id": 499290}, {"name": "Sonia Fahmy", "id": 227808}, {"name": "Y. Charlie Hu", "id": 23786}, {"name": "Nick Feamster", "id": 41712}], "links": [{"source": 106382, "target": 23786}, {"source": 106382, "target": 33858}, {"source": 106382, "target": 41712}, {"source": 106382, "target": 9542}, {"source": 106382, "target": 9545}, {"source": 106382, "target": 117312}, {"source": 106382, "target": 131285}, {"source": 106382, "target": 145225}, {"source": 106382, "target": 333741}, {"source": 106382, "target": 283681}, {"source": 106382, "target": 499290}, {"source": 257426, "target": 9542}, {"source": 257426, "target": 9545}, {"source": 257426, "target": 41712}, {"source": 257426, "target": 131285}, {"source": 257426, "target": 145225}, {"source": 257426, "target": 227808}, {"source": 257426, "target": 333741}, {"source": 76693, "target": 117312}, {"source": 76693, "target": 227808}, {"source": 89365, "target": 36657}, {"source": 126359, "target": 88731}, {"source": 126359, "target": 41712}, {"source": 126359, "target": 117312}, {"source": 126359, "target": 131285}, {"source": 88731, "target": 9545}, {"source": 88731, "target": 41712}, {"source": 88731, "target": 9542}, {"source": 88731, "target": 107056}, {"source": 88731, "target": 117312}, {"source": 88731, "target": 131285}, {"source": 88731, "target": 145225}, {"source": 88731, "target": 283681}, {"source": 88731, "target": 333741}, {"source": 137886, "target": 5970}, {"source": 137886, "target": 9541}, {"source": 137886, "target": 9542}, {"source": 137886, "target": 9545}, {"source": 137886, "target": 41712}, {"source": 283681, "target": 33858}, {"source": 283681, "target": 117312}, {"source": 283681, "target": 131285}, {"source": 333741, "target": 9542}, {"source": 333741, "target": 9545}, {"source": 333741, "target": 23786}, {"source": 333741, "target": 33858}, {"source": 333741, "target": 41712}, {"source": 333741, "target": 107056}, {"source": 333741, "target": 131285}, {"source": 333741, "target": 145225}, {"source": 333741, "target": 227808}, {"source": 333741, "target": 450129}, {"source": 333741, "target": 499290}, {"source": 333741, "target": 852404}, {"source": 107056, "target": 9542}, {"source": 107056, "target": 9545}, {"source": 107056, "target": 23786}, {"source": 107056, "target": 41712}, {"source": 107056, "target": 131285}, {"source": 107056, "target": 145225}, {"source": 107056, "target": 227808}, {"source": 107056, "target": 852404}, {"source": 36657, "target": 9545}, {"source": 36657, "target": 23786}, {"source": 36657, "target": 117312}, {"source": 36657, "target": 131285}, {"source": 852404, "target": 9542}, {"source": 852404, "target": 9545}, {"source": 852404, "target": 131285}, {"source": 117312, "target": 5970}, {"source": 117312, "target": 9542}, {"source": 117312, "target": 9545}, {"source": 117312, "target": 23786}, {"source": 117312, "target": 33858}, {"source": 117312, "target": 41712}, {"source": 117312, "target": 131285}, {"source": 117312, "target": 227808}, {"source": 33858, "target": 9542}, {"source": 33858, "target": 9545}, {"source": 33858, "target": 23786}, {"source": 33858, "target": 41712}, {"source": 33858, "target": 131285}, {"source": 33858, "target": 145225}, {"source": 33858, "target": 227808}, {"source": 9541, "target": 9542}, {"source": 9541, "target": 9545}, {"source": 9542, "target": 9545}, {"source": 9542, "target": 41712}, {"source": 9542, "target": 131285}, {"source": 9542, "target": 145225}, {"source": 9542, "target": 23786}, {"source": 9542, "target": 227808}, {"source": 9542, "target": 450129}, {"source": 9542, "target": 499290}, {"source": 9545, "target": 5970}, {"source": 9545, "target": 41712}, {"source": 9545, "target": 131285}, {"source": 9545, "target": 145225}, {"source": 9545, "target": 23786}, {"source": 9545, "target": 227808}, {"source": 9545, "target": 450129}, {"source": 9545, "target": 499290}, {"source": 145225, "target": 5970}, {"source": 145225, "target": 23786}, {"source": 145225, "target": 41712}, {"source": 145225, "target": 131285}, {"source": 145225, "target": 227808}, {"source": 145225, "target": 499290}, {"source": 5970, "target": 41712}, {"source": 5970, "target": 131285}, {"source": 131285, "target": 23786}, {"source": 131285, "target": 41712}, {"source": 131285, "target": 227808}, {"source": 499290, "target": 23786}, {"source": 499290, "target": 41712}, {"source": 227808, "target": 23786}, {"source": 227808, "target": 41712}, {"source": 23786, "target": 41712}]}
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: Zheng Zhang, Xiaoliang Zhao, Marcelo Pias, Sem C. Borst, Eric Keller, Steve Uhlig, Anna Sperotto, Dejan Kostic, Mohit Lad, Olaf Maennel, Victor C. M. Leung, Ravish Khosla, Sung-Hwa Lim, M. Frans Kaashoek, Jianping Wu, Eric Osterweil, Daniel Massey, David S. Touretzky, Lixia Zhang, Dan Pei, Alessio Campisano, Thomas Engel, Jennifer Rexford, Pierre-Antoine Vervier, Sonia Fahmy, Y. Charlie Hu, Nick Feamster
- Research collaborations between these authors: Zheng Zhang and Y. Charlie Hu, Zheng Zhang and Jianping Wu, Zheng Zhang and Nick Feamster, Zheng Zhang and Daniel Massey, Zheng Zhang and Lixia Zhang, Zheng Zhang and M. Frans Kaashoek, Zheng Zhang and Jennifer Rexford, Zheng Zhang and Dan Pei, Zheng Zhang and Mohit Lad, Zheng Zhang and Dejan Kostic, Zheng Zhang and Pierre-Antoine Vervier, Xiaoliang Zhao and Daniel Massey, Xiaoliang Zhao and Lixia Zhang, Xiaoliang Zhao and Nick Feamster, Xiaoliang Zhao and Jennifer Rexford, Xiaoliang Zhao and Dan Pei, Xiaoliang Zhao and Sonia Fahmy, Xiaoliang Zhao and Mohit Lad, Marcelo Pias and M. Frans Kaashoek, Marcelo Pias and Sonia Fahmy, Sem C. Borst and Victor C. M. Leung, Eric Keller and Steve Uhlig, Eric Keller and Nick Feamster, Eric Keller and M. Frans Kaashoek, Eric Keller and Jennifer Rexford, Steve Uhlig and Lixia Zhang, Steve Uhlig and Nick Feamster, Steve Uhlig and Daniel Massey, Steve Uhlig and Olaf Maennel, Steve Uhlig and M. Frans Kaashoek, Steve Uhlig and Jennifer Rexford, Steve Uhlig and Dan Pei, Steve Uhlig and Dejan Kostic, Steve Uhlig and Mohit Lad, Anna Sperotto and Thomas Engel, Anna Sperotto and Eric Osterweil, Anna Sperotto and Daniel Massey, Anna Sperotto and Lixia Zhang, Anna Sperotto and Nick Feamster, Dejan Kostic and Jianping Wu, Dejan Kostic and M. Frans Kaashoek, Dejan Kostic and Jennifer Rexford, Mohit Lad and Daniel Massey, Mohit Lad and Lixia Zhang, Mohit Lad and Y. Charlie Hu, Mohit Lad and Jianping Wu, Mohit Lad and Nick Feamster, Mohit Lad and Olaf Maennel, Mohit Lad and Jennifer Rexford, Mohit Lad and Dan Pei, Mohit Lad and Sonia Fahmy, Mohit Lad and Alessio Campisano, Mohit Lad and Pierre-Antoine Vervier, Mohit Lad and Ravish Khosla, Olaf Maennel and Daniel Massey, Olaf Maennel and Lixia Zhang, Olaf Maennel and Y. Charlie Hu, Olaf Maennel and Nick Feamster, Olaf Maennel and Jennifer Rexford, Olaf Maennel and Dan Pei, Olaf Maennel and Sonia Fahmy, Olaf Maennel and Ravish Khosla, Victor C. M. Leung and Lixia Zhang, Victor C. M. Leung and Y. Charlie Hu, Victor C. M. Leung and M. Frans Kaashoek, Victor C. M. Leung and Jennifer Rexford, Ravish Khosla and Daniel Massey, Ravish Khosla and Lixia Zhang, Ravish Khosla and Jennifer Rexford, M. Frans Kaashoek and Thomas Engel, M. Frans Kaashoek and Daniel Massey, M. Frans Kaashoek and Lixia Zhang, M. Frans Kaashoek and Y. Charlie Hu, M. Frans Kaashoek and Jianping Wu, M. Frans Kaashoek and Nick Feamster, M. Frans Kaashoek and Jennifer Rexford, M. Frans Kaashoek and Sonia Fahmy, Jianping Wu and Daniel Massey, Jianping Wu and Lixia Zhang, Jianping Wu and Y. Charlie Hu, Jianping Wu and Nick Feamster, Jianping Wu and Jennifer Rexford, Jianping Wu and Dan Pei, Jianping Wu and Sonia Fahmy, Eric Osterweil and Daniel Massey, Eric Osterweil and Lixia Zhang, Daniel Massey and Lixia Zhang, Daniel Massey and Nick Feamster, Daniel Massey and Jennifer Rexford, Daniel Massey and Dan Pei, Daniel Massey and Y. Charlie Hu, Daniel Massey and Sonia Fahmy, Daniel Massey and Alessio Campisano, Daniel Massey and Pierre-Antoine Vervier, Lixia Zhang and Thomas Engel, Lixia Zhang and Nick Feamster, Lixia Zhang and Jennifer Rexford, Lixia Zhang and Dan Pei, Lixia Zhang and Y. Charlie Hu, Lixia Zhang and Sonia Fahmy, Lixia Zhang and Alessio Campisano, Lixia Zhang and Pierre-Antoine Vervier, Dan Pei and Thomas Engel, Dan Pei and Y. Charlie Hu, Dan Pei and Nick Feamster, Dan Pei and Jennifer Rexford, Dan Pei and Sonia Fahmy, Dan Pei and Pierre-Antoine Vervier, Thomas Engel and Nick Feamster, Thomas Engel and Jennifer Rexford, Jennifer Rexford and Y. Charlie Hu, Jennifer Rexford and Nick Feamster, Jennifer Rexford and Sonia Fahmy, Pierre-Antoine Vervier and Y. Charlie Hu, Pierre-Antoine Vervier and Nick Feamster, Sonia Fahmy and Y. Charlie Hu, Sonia Fahmy and Nick Feamster, Y. Charlie Hu and Nick Feamster.
Please identify the common neighbors of Zheng Zhang and Xiaoliang Zhao in this network.
Present your answer in the following format: [AuthorA, AuthorB, AuthorC, AuthorD, ...].
test