import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    final Scanner sc = new Scanner(System.in);
	String str = sc.nextLine();
	String[] s = str.split("");
    if(s[2].equals(s[3]) && s[4].equals(s[5])){
      	System.out.println("Yes");
      	return;
    }
    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