const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    while(line = await readline()){
      let nums = line.split("");

      let reverseNums = nums.reverse();

      let result = "";

      reverseNums.forEach(item => {
        result += item
      })

      console.log(result);
    }
}()