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: Runtime Error)

K,N=map(int,input().split())
A=list(map(int,input().split()))
d=0
for i in range(N-1):
  if d == 0 and A[i+1]-A[0] >= K/2:
    d=d+A[i]-A[0]+K-A[i+1]
if d == 0:
  d=d+A[N-1]-A[N-2]
print(d)