import java.util.*;

public class Main {
    public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    }
    static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    }
}

/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