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 Kotlin (1.0.0) (judge verdict: Accepted)

fun main(args:Array<String>) {
    val userInput: String = readLine()!!
    val judgeArray = arrayOf(2,4)
    var tfFlag : Boolean = true

    for (i in judgeArray) {
        if (!(userInput[i] == userInput[i+1])) {
            tfFlag = false
        }
    }

    if (tfFlag) {
        println("Yes")
    } else{
        println("No")
    }
}