import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      String S = sc.next();
      String a = S.substring(2,3);
      String b = S.substring(3,4);
      String c = S.substring(4,5);
      String d = S.substring(5,6);
      if(a.equals(b)&&c.equals(d)){
        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