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 Ruby (2.3.3) (judge verdict: Accepted)

S = gets.chomp              # 文字列。chompを付けないと改行文字がついてくる
S.freeze
wk = S.split("")

if wk[2].gsub(" ", "") == wk[3].gsub(" ", "") && wk[4].gsub(" ", "") == wk[5].gsub(" ", "") then
  puts "Yes"
else
  puts "No"
end