7
1
1
1
1  7
1  1
7
1  1  1  6
2  0  1  5
2  1  1  4
2  0  1  3
2  1  1  2
2  0  1  1
3  1  0  0

//7 rows, 1 tube linhe, 1 tube per line, 1 circuit, counter-cross-flow