func_code_string: #include <bits/stdc++.h>   using namespace std;   struct Amulet {     char p[2][2];     void Read() { cin >> p[0][0] >> p[0][1] >> p[1][0] >> p[1][1]; }     Amulet Rotate() const {       Amulet ret(*this);       ret.p[0][0] = this->p[0][1];       ret.p[0][1] = this->p[1][1];       ret.p[1][0] = this->p[0][0];       ret.p[1][1] = this->p[1][0];       return ret;     }   };   bool Equiv(Amulet const& a1, Amulet const& a2) {     return a1.p[0][0] == a2.p[0][0] && a1.p[0][1] == a2.p[0][1] &&            a1.p[1][0] == a2.p[1][0] && a1.p[1][1] == a2.p[1][1];   }   bool operator==(Amulet const& a1, Amulet const& a2) {     Amulet tmp(a1);     for (int i = 0; i < 4; ++i) {       if (Equiv(tmp, a2)) return true;       tmp = tmp.Rotate();     }     return false;   }   int main() {     vector<Amulet> v;     int n;     cin >> n;     for (int i = 0; i < n; ++i) {       Amulet a;       a.Read();       vector<Amulet>::iterator it = find(v.begin(), v.end(), a);       if (it == v.end()) {         v.push_back(a);       }       char dummy;       cin >> dummy >> dummy;     }     cout << v.size() << endl;   }   