func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 10000000;   const int MAX = 150;   string s;   int found(string aux) {     int ans = 0;     int cnt = 0;     for (int i = 0; i < s.size(); i++) {       for (int j = 0, k = i; j < aux.size(); j++, k++) {         if (k == s.size()) break;         if (aux[j] == s[k])           cnt++;         else {           cnt = 0;           break;         }       }       if (cnt == aux.size()) ans++;     }     return ans;   }   int main() {     cin >> s;     int ans = 0;     ans += found( Danil );     ans += found( Olya );     ans += found( Slava );     ans += found( Ann );     ans += found( Nikita );     if (ans == 1)       puts( YES );     else       puts( NO );     return 0;   }   