import java.util.Scanner;
public class Main{
	public static void main(String args[]){
      Scanner sc = new Scanner(System.in);
      String list[] = sc.next().split("");
      if(list[2].equals(list[3]) && list[4].equals(list[5])){
        System.out.print("Yes");
      }else{
        System.out.print("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