CSUOJ_1002

/*
 *  Title : A+B(III)
 *  Data : 2016/11/09
 *  Author : Andrew
 */

#include <iostream>
#include <cstring>

int main() {
    std::string str1, str2;
    while (std::cin >> str1 >> str2) {
        int a[], b[], len;
        memset(a, , sizeof(a));
        memset(b, , sizeof(b));
        if (str1 == "" && str2 == "") {
            break;
        }
        a[] = str1.length();
        b[] = str2.length();
        for (int i = ; i <= a[]; ++i)
            a[i] = str1[a[] - i] - '';
        for (int j = ; j <= b[]; ++j)
            b[j] = str2[b[] - j] - '';
        len = (a[] > b[] ? a[] : b[]);
        for (int i = ; i <= len; i++) {
            a[i] += b[i];
            a[i + ] += a[i] / ;
            a[i] %= ;
        }
        len++;
        while ((a[len] == ) && (len > ))
            len--;
        for (int i = len; i >= ; i--)
            std::cout << a[i];
        std::cout << std::endl;
    }
    return ;
}