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 =
            String.implode
                (List.map
                     (fn ch =>
                         if ch = #"<" then #">"
                         else #"<")
                     (List.rev (String.explode s)))
    in
        print (ans ^ "\n")
    end