const rl = require('readline').createInterface({
    input: process.stdin
});

var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function (){
    while(line = await readline()){
		// 使用数组的反转功能
        const result = line.split('').reverse().join('')
        console.log(result)
    }
}()