import java.io.*;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Coffee coffee = new Coffee();
        coffee.solve(sc);
    }

    static class Coffee {
        public void solve(Scanner sc) {
            String str = sc.next();
            if (str.charAt(2) == str.charAt(3) && str.charAt(4) == str.charAt(5)) System.out.println("Yes");
            else System.out.println("No");
        }
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz