10 3 20
6 2 0 2 0 0 0 0 2 0
0 0 0 0 2 4 6 0 0 4
b 6 0
b 6 0
a 3 4
b 10 4
a 7 6
b 2 6
a 5 6
a 4 4
a 3 6
a 6 2
a 2 0
a 4 2
b 6 0
b 2 6
a 3 2
b 5 4
b 7 0
a 3 0
b 3 6
b 4 6