#include <bits/stdc++.h>
using namespace std;
using namespace std;
int main() {
  char S[101];
  char key[10];
  key[0] = 'k';
  key[1] = 'e';
  key[2] = 'y';
  key[3] = 'e';
  key[4] = 'n';
  key[5] = 'c';
  key[6] = 'e';
  gets(S);
  int keysoeji = 0;
  int ikkai = 0;
  int Ssoeji = 0;
  int answer = 1;
  while ((answer == 1) && Ssoeji < strlen(S)) {
    if (S[Ssoeji] == key[keysoeji]) {
      if (Ssoeji != keysoeji) {
        ikkai = 1;
      }
      keysoeji++;
      Ssoeji++;
    } else {
      if (ikkai == 0) {
        Ssoeji++;
      } else {
        answer = 0;
      }
    }
  }
  if ((answer == 1) && (keysoeji == 7)) {
    printf("YES");
  } else {
    printf("NO");
  }
}
