fun readStr () =
    let
        fun scan reader stream = SOME (StringCvt.splitl (not o Char.isSpace) reader (StringCvt.skipWS reader stream))
    in
        valOf (TextIO.scanStream scan TextIO.stdIn)
    end


val () =
    let
        val s = readStr ()
        
        val ans =
            if
                (List.all(fn (ss) =>
                             ss = "AC")
                         (String.tokens(fn (ch) =>
                                           ch = #",")
                                       s))
            then "Done!"
            else "Failed..."
    in
        print (ans ^ "\n")  
    end