import System.IO
import Data.Char(toUpper)

main = do
       inh <- openFile "input.txt" ReadMode
       outh <- openFile "output.txt" WriteMode
       mainloop inh outh
       hClose inh
       hClose outh

mainloop :: Handle -> Handle -> IO ()
mainloop inh outh =
    do ineof <- hIsEOF inh
       if ineof
           then return ()
           else do inpStr <- hGetLine inh
                   hPutStrLn outh (map toUpper inpStr)
                   mainloop inh outh
