for(t2 = 0; t2 <= an-1; t2++) {
  for(t4 = 0; t4 <= bm-1; t4++) {
    s2(t2,t4,0);
    s3(t2,t4,0);
    s4(t2,t4,1);
    s5(t2,t4,2);
    s6(t2,t4,3);
    for(t6 = 4; t6 <= ambn-1; t6++) {
      s1(t2,t4,t6);
    }
  }
}