import java.util.Scanner; 
import java.util.Arrays;

class Main{

 public static void main(String[] args){

 Scanner scan = new Scanner(System.in);

 String S = scan.next();
 String[] split = S.split("");     
  
   
    if (split[2].equals(split[3])){
   if (split[4].equals(split[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