#include<bits/stdc++.h>
using namespace std;
string a,b,a1,b1;
long long int A,B;
int main(){
	cin>>a>>b;
	for(int i=a.size()-1;i>=0;i--){
		a1+=a[i];
	}
	for(int i=b.size()-1;i>=0;i--){
		b1+=b[i];
	}
	stringstream ss;
	ss<<a1;
	ss>>A;
	stringstream xs;
	xs<<b1;
	xs>>B;
	cout<<max(A,B);
}