"use strict";

function Main(input) {
  let N = input.trim().split(' ').map(x => x*1);
  let sum = 0;
  N.forEach(elm => sum += elm);
  if(sum <= 21){
  	console.log('win');
  } else {
    console.log('bust');
  }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
