# include<cstring> //字符串头文件 # include<iostream> using namespace std; int main(){ char a[50],b[50]; cin>>a>>b; int am=strlen(a); for(int i=0;i<am;i++){ if(a[i]==b[i]){ cout<<"1"; } else if(a[i]!=b[i]){ cout<<"0"; } } return 0; }