func_code_string: #include <bits/stdc++.h>   template <typename T>   T pow(T a, T b, long long m) {     T ans = 1;     while (b > 0) {       if (b % 2 == 1) ans = (ans * a) % m;       b /= 2;       a = (a * a) % m;     }     return ans % m;   }   using namespace std;   const long long N = 2e5 + 77;   string s;   void sol() {     long long n;     cin >> n;     vector<long long> A(30, 0);     for (long long(i) = (0); (i) < (n); (i)++) {       cin >> s;       for (long long(j) = (0); (j) < ((long long)s.size()); (j)++)         A[s[j] -  a ]++;     }     for (long long(i) = (0); (i) < ((long long)A.size()); (i)++)       if (A[i] % n != 0) {         cout <<  NO  <<   n ;         return;       }     cout <<  YES  <<   n ;   }   int32_t main() {     long long t;     cin >> t;     while (t--) sol();     return 0;   }   