for (int c0 = 2; c0 <= 3; c0 += 1)
for (int c1 = -c0 + 6; c1 <= 6; c1 += 1)
S1(c0, c1);
for (int c0 = 4; c0 <= 8; c0 += 1) {
if (c0 == 4)
for (int c1 = 3; c1 <= 4; c1 += 1)
S1(4, c1);
if (c0 <= 5) {
S1(c0, -c0 + 9);
S2(c0, -c0 + 9);
} else {
S2(c0, -c0 + 9);
}
for (int c1 = max(c0 - 1, -c0 + 10); c1 <= 6; c1 += 1)
S1(c0, c1);
}