#!/bin/bash
':' /*
docker run --rm -it -v $(cd $(dirname $0) && pwd):/vo:ro node:5.2-slim \
  /bin/bash -c "node /vo/$(basename $0) < /vo/g.inp"; exit $?
exit 0
*/

"use strict";

let main = (input) => {
  let eqn=input.split("\n")[0].replace(/ /g, "+");
  let ans = "win";
  if (eval(eqn) >= 22) ans= "bust"
  return ans;
};
console.log(main(require("fs").readFileSync("/dev/stdin", "utf-8")));
