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


fun member x nil = false
  | member x (h::tl) =
    if x = h
    then true
    else member x tl


val () =
    let
        val n = readStr ()

        val exploded = String.explode n

        val ans = if member #"4" exploded andalso member #"6" exploded
                  then "Beautiful"
                  else "..."
    in
        print (ans ^ "\n")
    end