1 for (int c1 = 1; c1 <= M; c1 += 1) 2 S2(c1); 3 for (int c0 = 2; c0 <= M; c0 += 1) { 4 for (int c2 = 1; c2 < c0; c2 += 1) 5 S1(c0, c2); 6 for (int c2 = c0 + 1; c2 <= M; c2 += 1) 7 for (int c3 = 1; c3 < c0; c3 += 1) 8 S3(c0, c2, c3); 9 for (int c1 = 1; c1 < c0; c1 += 1) 10 S4(c1, c0); 11 } 12