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: Runtime Error)

program coffee

 character,dimension(1:6)::s
 
 do i=1,6
  read*,s(i)
 end do

 if(s(3)==s(4) .and. s(5)==s(6)) then
  print*,'Yes'
 else
  print*,'No'
 end if

end program coffee