653097
1.15A
2.5.7.8.12.13.17.18.19.20B
A1.15
A1,15
B2,5,7,8,12,13,17,18,19,20
C3,9,10,14
D4,6,11,16
A1 15
B2 5 7 8 12 13 17 18 19 20
C3 9 10 14
D