#include<bits/stdc++.h>

int main(){
    std::string a,b;std::cin>>a>>b;
    std::string s=a+b;
    std::string ans;
    for(int i=0;i<s.size();++i){
        if(ans.size()==0||(ans[0]=='-'&&ans.size()==1)){
            if(s[i]=='0') continue;
            else ans.push_back(s[i]);
        }
        else ans.push_back(s[i]);
    }
    std::cout<<ans<<std::endl;
}