#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <cstring>
#include <string>
#include <algorithm>
#include <cmath>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>

using namespace std;
#define INF 1234567890

int main() {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	
	string s1, s2;
	cin >> s1 >> s2;
	reverse(s1.begin(), s1.end());
	reverse(s2.begin(), s2.end());
	int i1, i2;
	i1 = stoi(s1);
	i2 = stoi(s2);
	cout << max(i1, i2);

	return 0;
}