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 Fortran (gfortran v4.8.4) (judge verdict: Accepted)

program abc
	implicit none
	character(len=6) :: fname
    character(len=1) :: a,b,c,d,e,f

	read(*,*) fname
	c = fname(3:3)
	d = fname(4:4)
	e = fname(5:5)
	f = fname(6:6)

    if(c == d .and. e == f) then
    	write(*,*) "Yes"
    else
    	write(*,*) "No"
    endif
    
end program abc