15 0 0
x12
8 0 0
0 28 0
12 0 0
3 0 0
6 0 0
0 0 8
10 0 0
0 12 30
0 15 0
4 0 0
0 50 0
x4
1 20 0
x8
1 0 0
0 
0 
x12
