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 Ruby (2.3.3) (judge verdict: Accepted)

input = STDIN.read.chomp
is_ok = false
[
    /^keyence.*/,
    /^k.*eyence$/,
    /^ke.*yence$/,
    /^key.*ence$/,
    /^keye.*nce$/,
    /^keyen.*ce$/,
    /^keyenc.*e$/,
    /.*keyence$/,
].each{ |pt|
    if input.match(pt) != nil
        is_ok = true
    end
}

puts is_ok ? "YES" : "NO"