Unit received a task, the leadership decided to xiao Zhang, Xiao Wang, Xiao Li, Xiaolin, Xiao Shen, Xiao Zhao six people elected three people to form a working group  The working group requested that two people, Xiao Zhang and Xiaolin, be selected  At least one of the two men, Xiao Wang and Xiao Li, can be selected
Xiao Zhao, Xiao Zhang, Xiao Wang
 If Xiao Shen and Xiao Zhao are selected at the same time, then Xiao Wang will not be selected