import qualified Data.ByteString.Char8 as BS
import Control.Monad
import Data.Char
import Data.List


-- space delimited integers
getVals::IO [Int]
getVals = unfoldr (BS.readInt . BS.dropWhile isSpace) <$> BS.getLine

-- space delimited strings
getStrings::IO [String]
getStrings = (map BS.unpack . BS.words) <$> BS.getLine

main::IO()
main = do
    vals <- getVals
    putStrLn $ (\ ls -> if (sum ls) >= 22 then "bust" else "win") vals 