import java.util.*;
import static java.lang.System.out;

public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        //int a = Integer.parseInt(sc.next());
        //int b = Integer.parseInt(sc.next());
        //int c = Integer.parseInt(sc.next());
        String in = sc.nextLine();
        if(in.length() >= 4 &&
                in.substring(2,3).equals(in.substring(3,4))
                &&
            in.length() >= 6 &&
                    in.substring(4,5).equals(in.substring(5,6))) {
            out.println("Yes");
        } else {
            out.println("No");
        }
        //System.out.println(a + " " + b + " " + c);

    }
}
/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