#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <algorithm>
using namespace std;

int main(void)
{
    string N, M; cin >> N >> M;
    int n=N.size(), m=M.size(); 
    if(n>m) cout << N << endl;
    else if(n<m) cout << M << endl;
    else {
        if(N>M) cout << N << endl;
        else cout << M << endl;
    }
    return 0;
}