func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, k;     cin >> n >> k;     string l;     cin >> l;     sort(l.begin(), l.end());     int a = 0, ans = 0;     char p = l[0];     for (;;) {       if (l[0] == p) {         a++;         l.erase(l.begin());       } else {         ans = max(ans, a);         if (l.size() > 0) {           p = l[0];           a = 0;         } else           break;       }     }     if (ans > k)       cout <<  NO ;     else       cout <<  YES ;     return 0;   }   