Friends, how can I add another submenu to the second submenu?

Question

https://code.sololearn.com/WPLw67Kje4fL/?ref=app

Answer 1

https://code.sololearn.com/WtCO9nCd5GIA/?ref=app

Answer 2

dude just do the same thing you done for first submenu, use <ul> after in li just after </a>