import java.util.*;
 
class Main{
  public static void main(String[] args){
    Scanner scan=new Scanner(System.in);
    String in=scan.next();
    String input[]=in.split("");
    boolean flag=true;
    if(input[2].equals(input[3]) && input[4].equals(input[5])){
      flag=false;
    }
    if(flag){
      System.out.println("No");
    }else{
      System.out.println("Yes");
    }
  }
}
/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