{ S1[i0, i1] -> [i0, i1, 0] : i1 >= 6 - i0 and i0 >= 2 and i1 >= 3 and i1 <= 6 and i1 >= -1 + i0; S2[i0, 9 - i0] -> [i0, 9 - i0, 1] : i0 <= 8 and i0 >= 4 }
{  :  }
{ [i, j, k] -> separate[o0] }