import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        String S = scan.next();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) 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