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 Kotlin (1.0.0) (judge verdict: Accepted)

fun main(args: Array<String>) {
    val s = readLine()!!

    val result = when {
        s == "keyence" -> true
        s.startsWith("keyence") -> true
        s.endsWith("keyence") -> true
        s.startsWith("k") && s.endsWith("eyence") -> true
        s.startsWith("ke") && s.endsWith("yence") -> true
        s.startsWith("key") && s.endsWith("ence") -> true
        s.startsWith("keye") && s.endsWith("nce") -> true
        s.startsWith("keyen") && s.endsWith("ce") -> true
        s.startsWith("keyenc") && s.endsWith("e") -> true
        else -> false
    }

    if (result) {
        println("YES")
    } else {
        println("NO")
    }
}