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