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1619A.cpp
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//<<<<<<<<<<<<<Tushars_07>>>>>>>>>>>>>>>>
#include<bits/stdc++.h>
using namespace std;
#define lli long long int
#define ll long long
#define no cout<<"NO \n";
#define yes cout<<"YES \n";
#define test lli trtyuio ; cin>>trtyuio; while(trtyuio--)
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
test{
int i = 0 ;
int counter = 0 ;
string str ;
cin >> str ;
if(str.size()%2==1)
no
else{
while(i<str.size()/2){
if(str[i]==str[i+str.size()/2]){
counter++;
}
else{
no
break ;
}
i++;
}
}
if( str.size()%2==0 && counter==str.size()/2)
yes
}
return 0;
}
//<<<<<<<<<<Tushars_07>>>>>>>>>>>>>>>>