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 Python (3.4.3) (judge verdict: Wrong Answer)

S=input()
if S=='keyence':
    print('YES')
else:
    pass
if S[:6]=='keyence' or S[-7:-1]=='keyence':
    print('YES')
else:
    pass
if S[0]=='k':
    if S[-6:-1]=='eyence':
        print('YES')
    else:
        pass
if S[:1]=='ke':
    if S[-5:-1]=='yence':
        print('YES')
    else:
        pass
if S[:2]=='key':
    if S[-4:-1]=='ence':
        print('YES')
    else:
        pass
if S[:3]=='keye':
    if S[-3:-1]=='nce':
        print('YES')
    else:
        pass
if S[:4]=='keyen':
    if S[-2:-1]=='ce':
        print('YES')
    else:
        pass
if S[:5]=='keyen':
    if S[-1]=='e':
        print('YES')
    else:
        pass
print('NO')