
main() {

  int i;


  for (i = 0; i < 2; i = i+1)
     print(1);

  i = 0;
  for (; i < 2; i = i+1)
     print(2);

  i = 0;
  for ( ; i < 2; i = i+1)
     print(3);

  for (i = 0;i < 2;) {
     print(4);
    i = i + 1;
  }

  for (i = 0; i < 2; ) {
     print(5);
    i=i+1;
  }

  print("ok");
}
