import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.List;
import java.util.Scanner;

public class Main {

		public static void main(String[] args) {

			Scanner sc = new Scanner(System.in);
			String str = sc.next();
			
			String str3 = str.substring(2, 3);
			String str4 = str.substring(3, 4);
			String str5 = str.substring(4, 5);
			String str6 = str.substring(5, 6);
				
			if(str3.equals(str4) && str5.equals(str6)) {
				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