#include <bits/stdc++.h>

using namespace std;

string s;
char ck[]={'k','e','y','e','n','c','e'};
int cnt,c;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>s;
	for(int i=0;i<s.size();i++)
	{
		if(key==7&&!c)
		{
			cout<<"YES";
			return 0;
		}
		if(s[i]==ck[cnt])
			cnt++;
		else if(c)
		{
			cout<<"NO";
			return 0;
		}
		else
		{
			while(i<s.size()&&s[i]!=ck[cnt]) i++;
			c=1;cnt++;
		}
	}	
	if(cnt==7)
		cout<<"YES";
	else
		cout<<"NO";
	return 0;
}