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 Rust (1.15.1) (judge verdict: Accepted)

fn a() {
    let mut input = String::new();
    std::io::stdin().read_line(&mut input).unwrap();

    let line: Vec<char> = input.chars().collect();
    if line[2] == line[3] && line[4] == line[5] {
        println!("Yes");
    }
    else {
        println!("No");
    }
}

fn main() {
    a();
}