do you mind if I give you a tip on your grammar? it's about the words "a" and "an"
if the word you're talking about begins with a vowel (such as "octopus" "igloo" or "apple") then you use an, (so it'd be an octopus, an igloo, an apple)
if the word you're talking about begins with a consonant (such as "can" "book" or "television") then you use "a" (so it'd be a can, a book, a television)
Sorry if I sound patronizing, hope I've helped!
