package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {
    scanner := bufio.NewScanner(os.Stdin)
    scanner.Scan()
    fmt.Println(reverse(scanner.Text()))
}

func reverse(s string) string {
    r := []rune{}
    for _,v := range s {
        r = append([]rune{v},r...)
    }
    return string(r)
}