let _ =
  print_int 1000000000; print_newline();
  print_int 10000000000; print_newline();
  print_int 100000000000; print_newline();
  print_int 1000000000000; print_newline();
  print_int 10000000000000; print_newline();
  print_int 100000000000000; print_newline();
  print_int 1000000000000000; print_newline();
  print_int 10000000000000000; print_newline();
  print_int 100000000000000000; print_newline();
  print_int 1000000000000000000; print_newline()