func_code_string: #include <bits/stdc++.h>   using namespace std;   set<string> f;   int main() {     int n;     cin >> n;     int ans = 0;     for (int i = 0; i < n; ++i) {       string s =   ;       while (1) {         char c;         cin >> c;         if (isdigit(c)) s += c;         if (((int)(s).size()) == 4) break;       }       swap(s[2], s[3]);       string t = s;       for (int i = 0; i < 4; ++i) {         char c = s[0];         for (int j = 0; j < 3; ++j) s[j] = s[j + 1];         s[3] = c;         if (s < t) t = s;       }       if (!f.count(t)) ++ans;       f.insert(t);     }     cout << ans << endl;     return 0;   }   