fun readInt () =
    valOf (TextIO.scanStream (Int.scan StringCvt.DEC) TextIO.stdIn)


val () =
    let
        val x = readInt ()

        val ans = if 3 <= x andalso x <= 5 then "spring"
                  else if 6 <= x andalso x <= 8 then "summer"
                  else if 9 <= x andalso x <= 11 then "fall"
                  else "winter"
    in
        print (ans ^ "\n")
    end