Public part: 1, 5
Then assign the following two groups to any circle.
2、6、7
3、4、8
Solution 2:
Common parts 2 and 4
Then assign the following two groups to any circle.
1、6、8
3、5、7
Reason: 1+2+3+4+5+6+7+8=36.
Then 2 1*2=42.
So the male part is 42-36=6.
Then distribute it.