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 (1.42.0) (judge verdict: Accepted)

fn main() {
    let s = {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).unwrap();
        s.trim_end().to_owned()
    };

    let a2 = s.chars().nth(2).unwrap() == s.chars().nth(3).unwrap();
    let a3 = s.chars().nth(4).unwrap() == s.chars().nth(5).unwrap();
    let result = if a2 && a3 {
        "Yes"
    } else {
        "No"
    };
    println!("{}", result)
}