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 C (GCC 9.2.1) (judge verdict: Runtime Error)

#include <stdio.h>
#include <string.h>
#define rep(i,n) for(int i=0; i<(int)(n); i++)

int main(){
    char s[105]; scanf("%s",s);
    char c[10] = {"keyence"};
    int n = strlen(s);
    int m = strlen(c);
    rep(i,n-m+1){
        char tc[10]={0};
        strncpy(tc,s,i);
        strncpy(tc+i,s+i+(n-m),m-i);
        if(strcmp(tc,c)==0){
            puts("YES");
            return 0;
        }
    }

    puts("NO");
}