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for (int c0 = 1; c0 <= 8; c0 += 1) for (int c1 = 0; c1 <= 7; c1 += 1) { if (c0 >= 2 && c0 <= 6 && c1 <= 4) s1(c0, c1); if (c1 + 1 >= c0) s0(c0, c1); }