#include<bits/stdc++.h> using namespace std; char s1[10086],s2[10086]; int main(){ cin>>s1>>s2; int len = strlen(s1); for(int i=0;i<=len-1;i++){ if(s1[i]==s2[i]){ cout<<1; } if(s1[i]!=s2[i]){ cout<<0; } } return 0; }