1 for (int c0 = 1; c0 <= M; c0 += 1) 2 for (int c1 = 1; c1 <= M; c1 += 1) 3 S1(c0, c1); 4 for (int c0 = 1; c0 <= M; c0 += 1) 5 for (int c1 = 1; c1 <= M; c1 += 1) 6 for (int c2 = 1; c2 <= M; c2 += 1) 7 S2(c0, c1, c2); 8