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 Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String keyence = "keyence";
    String str = sc.next();
    boolean judge = false;
    char[] carr = str.toCharArray();
    char[] key =keyence.toCharArray();
    for(int i=0;i<keyence.length();i++){
      if(carr[i]==key[i]){
        if(i==keyence.length()-1){
          judge = true;
        }
        continue;
      }else{
        for(int j=i+1;j<str.length();j++){
          if(carr[j]!=key[i]){
            continue;
          }else{
            if(keyence.substring(i).equals(str.substring(j))){
              judge = true;
            }
            break;
          }
        }
        break;
      }
    }
if(judge){
  System.out.println("YES");
}else{
  System.out.println("NO");
}
  }
}