function Main(input) {
    var radix = 'abcdefghijklmnopqrstuvwxyz'.split('');
    var digit = radix.length;
    console.log(input.toString(digit).replace(/./g, function(s) {
        return radix[parseInt(s, digit)];
    }));
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
