func_code_string: #include <bits/stdc++.h>   using namespace std;   const int inf = (int)1e9 + 7;   const long long INF = (long long)1e18 + 7;   const int N = 200007;   bool c;   int chkp(string x) {     int ans = 0;     if ((int)x.size() % 2) c = 1;     for (int i = 0, j = (int)x.size() - 1; i < j; i++, j--) {       if (x[i] == x[j]) continue;       ans++;     }     return ans;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     ;     int q;     cin >> q;     while (q--) {       int n, sol = 0;       cin >> n;       c = 0;       for (int i = 0; i < n; i++) {         string x;         cin >> x;         sol += chkp(x);       }       if (sol % 2 == 0 || c == 1)         cout << n <<   n ;       else         cout << n - 1 <<   n ;     }     return 0;   }   