for (int c0 = 0; c0 <= 9; c0 += 1)
for (int c1 = 0; c1 <= 9; c1 += 1) {
if (c0 == 0)
A(c1);
B(c0, c1);
}
for (int c0 = 0; c0 <= 9; c0 += 1)
for (int c1 = 0; c1 <= 9; c1 += 1) {
if (c0 == 0)
A(c1);
B(c0, c1);
}