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 PyPy3 (2.4.0) (judge verdict: Wrong Answer)

s=input()
k="keyence"
if s.find(k)!=-1:
    print("YES")
    exit()
for i in range(1,7):
    a=s.find(k[:i],0)
    if a>=0:
        b=s.find(k[i:],a+len(k[:i]))
        if b>0:
            print("YES")
            exit()
print("NO")