#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
using P=pair<ll,ll>;
using V=vector<ll>;
#define rep(i,n) for(ll i=0;i<n;i++)
#define REP(i,n) for(ll i=1;i<=n;i++)

int main(){
    string a,b;
    cin >> a >> b;
    reverse(a.begin(),a.end());
    reverse(b.begin(),b.end());
    while(a.size()<b.size()) a+='0';
    while(b.size()<a.size()) b+='0';
    a+='0';
    b+='0';

    string s;
    int n=a.size()-1;
    rep(i,n){
        int x=a[i]+b[i]-'0'*2;
        s+='0'+x%10;
        if(9<x) a[i+1]++;
    }
    
    if(a[n]=='1') s+='1';
    reverse(s.begin(),s.end());
    cout << s << endl;

}