{-# LANGUAGE OverloadedStrings #-}

import qualified Data.ByteString.Lazy.Char8 as LC
import qualified Data.ByteString.Char8 as SC
import Data.List (genericIndex)
import Data.Maybe (fromJust)

data Status = AC | ZETUBOU deriving (Enum, Show)
type Query a = (a, a, a)

-- Based on https://rosettacode.org/wiki/Evaluate_binomial_coefficients
binom :: Integral a => a -> a -> a
binom n k = flip genericIndex k $ genericIndex binoms n
    where
        next ns = zipWith (+) (0 : ns) $ ns ++ [0]
        binoms = iterate next [1]

querify :: [a] -> Query a
querify [x, y, z] = (x, y, z)
querify _ = error "the length of the list must be three"

judge :: Integral a => Query a -> Status
judge (d, x, t)
    | binom (x + d - 1) x <= t = AC
    | otherwise = ZETUBOU

unsafeReadInteger :: LC.ByteString -> Integer
unsafeReadInteger = fst . fromJust . LC.readInteger

showStatus :: Status -> SC.ByteString
showStatus AC = "AC"
showStatus ZETUBOU = "ZETUBOU"

main :: IO ()
main = do
    _ <- SC.getLine
    SC.putStr . SC.unlines .
        fmap (showStatus . judge . querify . fmap unsafeReadInteger . LC.words) .
            LC.lines =<< LC.getContents