1{ s0[i, j] -> [j, i, 0] : i >= 1 and i <= 9 and j >= 1 and j <= 9; s1[i, j] -> [j, i, 1] : i >= 1 and i <= 9 and j >= 1 and j <= 9 } 2{ : } 3{ [i0, i1, i2] -> separate[o0] : o0 >= 2; [i0, i1, i2] -> atomic[o0] : o0 <= 1 } 4