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("(%w+)keyence")
  or s:match("k(%w+)eyence")
  or s:match("ke(%w+)yence")
  or s:match("key(%w+)ence")
  or s:match("keye(%w+)nce")
  or s:match("keyen(%w+)ce")
  or s:match("keyenc(%w+)e")
  or s:match("keyence(%w+)")
  or s == "keyence" then
  print("YES")
else
  print("NO")
end