package main

import (
	"fmt"
)

func main() {
	var rs, rs2 []rune
	var s string

	fmt.Scanln(&s)
	rs = []rune(s)
	l := len(rs) - 1

	for ; l > -1; l-- {
		rs2 = append(rs2, rs[l])
	}
	fmt.Println(string(rs2))
}