Problem:
Score : 100 points

Problem Statement

A string of length 6 consisting of lowercase English letters is said to be coffee-like if and only if its 3-rd and 4-th characters are equal and its 5-th and 6-th characters are also equal.

Given a string S, determine whether it is coffee-like.

Constraints

S is a string of length 6 consisting of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S

Output

If S is coffee-like, print Yes; otherwise, print No.

Sample Input 1

sippuu

Sample Output 1

Yes

In sippuu, the 3-rd and 4-th characters are equal, and the 5-th and 6-th characters are also equal.

Sample Input 2

iphone

Sample Output 2

No

Sample Input 3

coffee

Sample Output 3

Yes

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

/*
 * FileName:     A
 * CreatedDate:  2020-03-28 20:59:35 +0900
 * LastModified: 2020-03-28 21:02:23 +0900
 */

#include <stdio.h>

int main(void){
    char S[6];
    scanf("%s",S);
    if(S[2]==S[3]){
        if(S[4]==S[5]){
            printf("Yes\n");
            return 0;
        }
    }
    printf("No\n");
    return 0;
}