#include <bits/stdc++.h>
#include <vector>
#include <tuple>
#include <regex>
#include <string>
#include <stack>
#include <algorithm>
using namespace std;
//printf , scanfが使えるよ！！
/*
[問題メモ]


*/

int main() {
    //Let's algorithm!!
    char a[101];
    char b[101];
    char ans[101];
    int temp;
    int carry = 0;
    scanf("%s %s",a,b);
    for(int i=0;i<101;i++){
        temp = a[i] + b[i] -'0' -'0' + carry;
        ans[i] = (temp % 10) + '0';
        carry = temp - (temp % 10);
    }
    printf("%s",ans);
    return 0;
}