import java.util.Scanner;
public class Main {
 public static void main(String[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     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