let print = this.print || console.log;
let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);

let a = gets();
let b = gets();

let firstNumber = 0;
let secondNumber = 0;

for (let i = 0; i < 2; i++) {
    firstNumber = Number(a.toString().split('').reverse().join(''));
    secondNumber = Number(b.toString().split('').reverse().join(''));
}
if (firstNumber > secondNumber) {
    console.log(firstNumber)
} else {
    console.log(secondNumber)
}