1 for (int c0 = 1; c0 <= 9; c0 += 1) 2 for (int c1 = 1; c1 <= 9; c1 += 1) { 3 s0(c1, c0); 4 if (c0 % 2 == 0) 5 s1(c1, c0); 6 } 7