0 50 0
x4
15 0 0
x16
3 60 0
12 0 0
x20
0 7 50
6 0 0
10 0 0
x12
20 0 0
x8
0 15 0
0 6 0
x1
0 0 50
2 0 0
0 10 0
50 
0 
x4
