import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	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