function main(input) {
    const cards = input.split(" ")
    cards.map(card => Number(card))
    const count = cards.reduce((sum,card) => {return sum + Number(card)}, 0)
    if (count>=22) {
        console.log("bust");
    } else if(count<21) {
        console.log("win");
    }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));