func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     map<char, int> ma;     int p;     char a, k[1000];     cin >> p;     for (int i = 0; i < p; i++) {       cin >> k[i];       a = tolower(k[i]);       ma[a]++;     }     if (ma.size() == 26)       cout <<  YES  << endl;     else       cout <<  NO  << endl;   }   