package main

import (
    "fmt"
)

func main() {
    var b string
    fmt.Scan(&b)
    str := []byte(b)
    for i,j := 0, len(str) - 1; i < j; i,j = i+1, j-1 {

        str[i], str[j] = str[j], str[i]
    }
    fmt.Println(string(str))
}