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

public class Main {
    public static void main(String[] args)
    {
        Scanner s = new Scanner(System.in);
        String S = s.nextLine();
        if(S.substring(2,3).equals(S.substring(3,4)) && S.substring(4,5).equals(S.substring(5,6)))
            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