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().strip()
N = len(S)
x = "keyence"
flag = 1
for i in range(N):
    if S[i]!=x[i]:
        cur = i
        for j in range(1,N+1):
            if S[-j]!=x[-j]:
                cur2 = N-j
                if S[:i]+S[cur2+1:]==x:
                    flag = 1
                else:
                    flag = 0
                break
        break
if flag==1:
    print("YES")
else:
    print("NO")