#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[51],b[51]; cin>>a>>b; for(int i=0;a[i]!='\0'||b[i]!='\0';i++){ if(a[i]==b[i]) cout<<"1"; else cout<<"0"; } return 0; }