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


//7 rows, 1 tube line, 1 tube per row, 7 circuits