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("")

S1 = str(S[-1])
S2 = str(S[-2])
S3 = str(S[-3])
S4 = str(S[-4])

n = 0

if S1 == S2:
    n += 1
if S3 == S4:
    n += 1

if n == 2:
    print("Yes")
else:
    print("No")