function Main(input){
    input= input.split(" ");
    input= input.map(Number);
    
    var sub = function(arry){
        var sum = 0;
        arry.forEach(element => {
            sum += element;
        });
        return sum;
    }
    
    if(sub(input) <= 21){
        console.log('win');
    }else{
        console.log('bust');
    }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8")); 