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())) {
// 1. 字符串转数组 split()
// 2. 字符串反转 reverse()
// 3. 数组转为字符串 join()
const result = line.split('').reverse().join("");
console.log(result);
}
})();