#include <bits/stdc++.h>
using namespace std;
 
int t;
string s;
 
string check(){
    if (s.size() % 2 != 0) return "NO";
    int d = 0;
    for (int i = 0; i < s.size() / 2; i++)
        d += s[i];
    for (int i = s.size() / 2; i < s.size(); i++)
        d -= s[i];
    return (d == 0 ? "YES" : "NO");
}
 
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >>t;
    while (t--){
        cin >>s;
        cout <<check() <<'\n';
    }
    return 0;
}

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