package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"strings"
)

func main() {
	b, _ := io.ReadAll(bufio.NewReader(os.Stdin))
	s := strings.TrimRight(string(b), "\r\n")
	r := []rune(s)
	for i, j := 0, len(r)-1; i < j; i, j = i+1, j-1 {
		r[i], r[j] = r[j], r[i]
	}
	fmt.Println(string(r))
}