#include <iostream>
#include <algorithm>
using namespace std;
int main(){
  string s,t;cin>>s>>t;
  if(s.size() < t.size())swap(s,t);
  reverse(s.begin(), s.end());
  reverse(t.begin(), t.end());
  int k = 0;
  for(int i = 0; t.size() > i; i++){
    char tmp = ((s[i]-'0'+t[i]-'0'+k)%10) + '0';
    k = (s[i]-'0'+t[i]-'0'+k) >= 10;
    s[i] = tmp;
  }
  reverse(s.begin(), s.end());
  cout << s << endl;
}