fun print () {
  write (a);
  write (b);
  write (c)
}

fun test1 (a) {
  write (a);
  print ();
  write (a);
  if a < 4 then
     test2 (a+1);
     print ()
  fi 
}

fun test2 (b) {
  write (b);
  print ();
  test1 (b+1);
  print ()
}

x := read ();

a := 100;
b := 200;
c := 300;

test1 (1)