object Pierwsze extends App{

    def odwroc(str :String) :String={
        def odwrocAcc(str :String,length :Int, acc :String) :String = {
            if(length == 0){
                return  acc
            }
            odwrocAcc(str, length-1, acc+str(length-1))
        }
        odwrocAcc(str, str.length, "")
    }

    var slowo = io.StdIn.readLine()
    print(odwroc(slowo))
}