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: Accepted)

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