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 Python (3.4.3) (judge verdict: Accepted)

from math import ceil,sqrt
def main():
    
    # for _ in range(ii()):
    
    # t=int(input())
    # n,m=map(int,input().split())
    # a=list(map(int,input().split()))
    
    
    
    
    
    s=input()
    if(s[2]==s[3] and s[4]==s[5]):
        print('Yes')
    else:
        print('No')
    
    
    
    
    
    
    
    
    




    
if __name__ =="__main__":
    main()