func_code_string: #include <bits/stdc++.h>   using namespace std;   int gd(const string &a, const string &b) {     int d = 0;     for (int i = 0; i < (int)a.size(); i++)       if (a[i] != b[i]) d++;     return d;   }   string a[1005];   int main() {     int n;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> a[i];     }     int mind = 1000;     for (int i = 0; i < n; i++)       for (int j = i + 1; j < n; j++) mind = min(mind, gd(a[i], a[j]));     cout << min(6, (mind - 1) / 2) << endl;     return 0;   }   