1for (int c0 = 1; c0 <= 36; c0 += 1)
2  if (c0 <= 3) {
3    for (int c1 = 1; c1 <= 9; c1 += 1)
4      s1(c1, c0);
5  } else if (c0 <= 9) {
6    for (int c1 = 1; c1 <= 9; c1 += 1) {
7      if (c0 % 4 == 0)
8        s0(c1, c0 / 4);
9      s1(c1, c0);
10    }
11  } else if (c0 % 4 == 0)
12    for (int c1 = 1; c1 <= 9; c1 += 1)
13      s0(c1, c0 / 4);
14