import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final Scanner input = new Scanner(System.in);

        char[] text = input.nextLine().trim().toCharArray();
        if(text.length >= 6){
            if(text[3-1]==text[4-1] && text[5-1] ==text[6-1]){
                System.out.println("Yes");
            }else{
                System.out.println("No");
            }
        }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