{

  for (int c0 = 1; c0 <= 3; c0 += 1)

    for (int c1 = 1; c1 <= 9; c1 += 1)

      s1(c1, c0);

  for (int c0 = 4; c0 <= 9; c0 += 1)

    for (int c1 = 1; c1 <= 9; c1 += 1) {

      if (c0 % 4 == 0)

        s0(c1, c0 / 4);

      s1(c1, c0);

    }

  for (int c0 = 3; c0 <= 9; c0 += 1)

    for (int c1 = 1; c1 <= 9; c1 += 1)

      s0(c1, c0);

}