Shortcut to select mutliple flashcards to change flashcard direction

I made front to back flashcards and would like to study them from back to front without having to a) remake all the flashcards as back to front, or b) go through each flashcard and individually change the flashcard direction, as these would be too time consuming. I saw a similar thread highlighting this issue and the response was to select the flashcards you want to change and type ctrl+shft+b. I tried this but it changes the flashcard to double-sided, not back to front.