import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String s ="";
    if(sc.hasNext())
    s= sc.next();
    if(s.length()==6 && s.charAt(2)==s.charAt(3) && s.charAt(4)==s.charAt(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