X
30 people in X
Y
40 people in Y
Z
25 people in Z
38 people in
C
30 people in C
B
25 people in B
A
40 people in A
38 people in
38 people from to
20 people from A to Y
15 people from A to X
15 people from B to Y
15 people from C to Z
10 people from C to X
5 people from B to X
5 people from C to Y
5 people from B to Z
5 people from A to Z