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)

S = input()
#6文字の入力を配列S[0,1,2,3,4,5]に格納

if S[2]==S[3] and S[4]==S[5]:
    print("Yes")
#もし、配列S[2]とS[3]が等しく、かつ配列S[4]とS[5]が等しければ、
#Yesを出力する
else:
    print("No")  
#それ以外の場合はNoを出力する