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


public class Main {
    public static void main (String[]args)throws IOException {
        Scanner scanner = new Scanner(System.in);
        String s= scanner.next();
        boolean coffeeLike=true;
        if (s.charAt(2)!=s.charAt(3)){
            coffeeLike=false;
        }
        if (s.charAt(4)!=s.charAt(5)){
            coffeeLike=false;
        }
        System.out.println(coffeeLike? "Yes" : "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