import qualified Data.Text as T
import qualified Data.Text.IO as T
import qualified Data.Text.Read as T
import Data.Bool (bool)

main :: IO ()
main = do
  a <- T.head <$> T.getLine :: IO Char
  putStrLn . bool "A" "a" $ 'a' <= a

unsafeTextToInt :: T.Text -> Int
unsafeTextToInt s = case T.signed T.decimal s of
  Right (n, _) -> n
{-# INLINE unsafeTextToInt #-}
