Some letters change sounds

While every letter is pronounced, some particularly "b, k, and q" change sounds depending on where they are in a sentence.

the letters b, k, and q are always pronounced "bʌ" "kʌ" and "kwʌ" when in the first or last position of a sentence. They are also pronounced this way when behind another b, k, or q. If these conditions are not met, they will be pronounced as "b" "k" "kw".