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.

Input

Input is given from Standard Input in the following format:
S

Output

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

Constraints

• The length of S is between 7 and 100 (inclusive).
• S consists of lowercase English letters.

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

见题面 Input 部分

见题面 Output 部分