if (N >= 1) {

  S1(0);

  if (N == 1) {

    for (int c1 = 0; c1 < M; c1 += 1)

      S2(0, c1);

    S3(0);

    for (int c1 = 0; c1 < M; c1 += 1)

      S4(0, c1);

    S10(0);

    S5(0);

  } else {

    for (int c1 = 0; c1 < M; c1 += 1)

      S2(0, c1);

    S3(0);

    for (int c1 = 0; c1 < M; c1 += 1)

      S4(0, c1);

    S10(0);

    S1(1);

    S5(0);

  }

  for (int c0 = 2; c0 < N; c0 += 1) {

    for (int c1 = c0 - 1; c1 < N; c1 += 1) {

      S6(c0 - 2, c1);

      for (int c2 = c0 - 2; c2 < M; c2 += 1)

        S7(c0 - 2, c1, c2);

      S8(c0 - 2, c1);

      for (int c2 = c0 - 2; c2 < M; c2 += 1)

        S9(c0 - 2, c1, c2);

    }

    for (int c1 = c0 - 1; c1 < M; c1 += 1)

      S2(c0 - 1, c1);

    S3(c0 - 1);

    for (int c1 = c0 - 1; c1 < M; c1 += 1)

      S4(c0 - 1, c1);

    S10(c0 - 1);

    S1(c0);

    S5(c0 - 1);

  }

  if (N >= 2) {

    S6(N - 2, N - 1);

    for (int c2 = N - 2; c2 < M; c2 += 1)

      S7(N - 2, N - 1, c2);

    S8(N - 2, N - 1);

    for (int c2 = N - 2; c2 < M; c2 += 1)

      S9(N - 2, N - 1, c2);

    for (int c1 = N - 1; c1 < M; c1 += 1)

      S2(N - 1, c1);

    S3(N - 1);

    for (int c1 = N - 1; c1 < M; c1 += 1)

      S4(N - 1, c1);

    S10(N - 1);

    S5(N - 1);

  }

}