'use strict'
function Main(input) {

  let Aset = input.split(" ").map(v => parseInt(v));
  // console.log({ Aset });

  let Answer = Aset[0] + Aset[1] + Aset[2];
  // console.log({ Answer });
  console.log(Answer >= 22 ? 'bust' : 'win');

}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
