There was a group discussion in a city-wide judicial worker meeting  There was a group of 8 people  At the beginning of the meeting, the group leader asked everyone if they knew each other
As a result, only one person in the group knew 3 of the group, and 3 people knew 2 of the group, 4 people know 1 person in the group
 The group leader knows the most people in the group, and the others know fewer