Test cases arent executed
please check
#include<bits/stdc++.h>
using namespace std;
main()
{
int t;
cin>>t;
while(t!=0)
{
string st,st2;
cin.get();
getline(cin,st);
getline(cin,st2);
//cout<<strlen(st)<<endl;
for(int i=0;i<st.size();i++)
{
cout<<(st[i]^st2[i]);
}
cout<<endl;
t--;
}
return 0;
}