7 8
A 5   B 20   C 2   D 2   E 6   F 5   G 20
a b c d e f g h

2 0 0 0 0 0 0 0
0 2 0 0 0 0 0 0
0 0 2 0 0 0 0 0
0 0 0 2 0 0 0 0
0 0 0 0 2 2 0 0
0 0 0 0 0 0 2 0
0 0 0 0 0 0 0 2
