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 JavaScript (node.js v5.12) (judge verdict: Accepted)

function Main(arg) {
  var n = arg.split("\n")[0];

  if (n[2] == n[3] && n[4] == n[5]) {
    console.log("Yes");
  }
  else {
    console.log("No");
    
  }

  return;
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));