Problem:
Score : 200 points

Problem Statement

A string is called a KEYENCE string when it can be changed to keyence by removing its contiguous substring (possibly empty) only once.

Given a string S consisting of lowercase English letters, determine if S is a KEYENCE string.

Constraints

The length of S is between 7 and 100 (inclusive).

S consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S

Output

If S is a KEYENCE string, print YES; otherwise, print NO.

Sample Input 1

keyofscience

Sample Output 1

YES

keyence is an abbreviation of key of science.

Sample Input 2

mpyszsbznf

Sample Output 2

NO

Sample Input 3

ashlfyha

Sample Output 3

NO

Sample Input 4

keyence

Sample Output 4

YES

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.util.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        String ans = "NO";
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == 'k'){
            	count++;
            }else if(count == 1 && s.charAt(i) == 'e'){
            	count++;
            }else if(count == 2 && s.charAt(i) == 'y'){
            	count++;
            }else if(count == 3 && s.charAt(i) == 'e'){
            	count++;
            }else if(count == 4 && s.charAt(i) == 'n'){
            	count++;
            }else if(count == 5 && s.charAt(i) == 'c'){
            	count++;
            }else if(count == 6 && s.charAt(i) == 'e'){
            	ans = "YES";
            }
        }
        System.out.println(ans);
    }
}