0-49 is everything from a null character up to the letter capital O. That’s a smaller range than before. You need to include range (decimal) 65 (capital letter A) to (decimal) 90 (capital letter Z), and then also include the punctuation (for instance, a period is (decimal) 46.)
Note that you’re trying to print lower-case letters. Your font does not define those, so you always need to type in capital letters.