// editor4
#include<iostream>
#include<string>
using namespace std;

int main(){
    string a, b;
    cin>> a>>b;
    
    int i= a.size() - 1;
    int j= b.size() - 1;
    int carry = 0;
    string result;
    
    while(i>=0||j>=0||carry){
        int sum= carry;
        
        if(i>=0)sum += a[i--] - '0';
        if(j>0)sum += b[j--] - '0';
        
        result = char ((sum % 2)+ '0');
        carry= sum/2;
    }
    cout<<result;
    return 0;
}