What word or words contain the letters b, p, q, and d?
They are NOT the same letter rotated. It can seem so if you have never written by hand, thus I suspect you must be quite young or (let's keep it soft) your interests and those of your educators while you were at school were in dissonance. These letter can look alike in some graphic computer fonts. In other computer graphic fonts they are different, and particularly in the script fonts (those which imitate the handwriting) these letters are different enough. Try writing by hand some words containing these letters (or ask anyone who can) and you will see.