#include
#include
using namespace std;
int main() {
int t;
cin>>t;
for(int i=0;i<t;i++){
int q;
string s,w,e,r,y;
cin>>s;
q=s.length();
if(q%2==0){
w = s.substr(0,((q/2)-1));
e = s.substr(q/2,q-1);
int k = e.compare(w);
if(k==0 || w.length() == e.length())
cout<<"YES";
else
cout<<"NO";
}
else{
r = s.substr(0,q/2-1);
y = s.substr((q/2)+1,q-1);
int k = r.compare(y);
if(k==0 || r.length() == y.length())
cout<<"YES";
else
cout<<"NO";
}
}
return 0;
}