package main

import (
	"bufio"
	"os"
	"fmt"
	"unicode/utf8"
)


func main(){
	b, _, _ := bufio.NewReaderSize(os.Stdin, 4096).ReadLine()
	
	for len(b) > 0 {
		r, size := utf8.DecodeLastRune(b)
		fmt.Printf("%c", r)
		b = b[:len(b) - size]
	}
	fmt.Println()
}