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 a = readStr ()
        val b = readStr ()

        val ans = if String.sub (a, String.size a - 1) = #"1" andalso
                     String.sub (b, String.size b - 1) = #"1"
                  then "Odd"
                  else "Even"
    in
        print (ans ^ "\n")
    end