import java.util.*;

class Main{
    public static void main(String[] args){
      Scanner scan = new Scanner(System.in);
      String str = scan.nextLine();
      String[] coffee = str.split("");
      if(Objects.equals(coffee[2], coffee[3])){
        if(Objects.equals(coffee[4], coffee[5])) System.out.println("Yes");
        else System.out.println("No");
      } 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