# include<iostream> # include<cstring> using namespace std; int main(){ int n; string s,x; cin>>s>>x; n=s.size(); for(int i=0;i<n;i++){ if(s[i]==x[i]){ cout<<"1"; } else if(s[i]>x[i]||s[i]<x[i]){ cout<<"0"; } } return 0; }