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 Lua (5.3.2) (judge verdict: Wrong Answer)

s=io.read()
if s:match("%l*(keyence)") or s:match("(k)%l*(eyence)") or s:match("(ke)%l*(yence)") or s:match("(key)%l*(ence)") or s:match("(keye)%l*(nce)") or s:match("(keyen)%l*(ce)") or s:match("(keyenc)%l*(e)") or s:match("(keyence)%l*") then
    print("YES")
else
    print("NO")
end