#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; }