This question should be on the UEB Literary forum. However, I'll quote rule 10.9.3c dealing with words involving shortforms that do not appear on the list at the back of the code book: "Use the shortform for quick if it begins the word and is not followed by a vowel or a y." Then go to 10.12.12 which says that if punctuation, an indicator or a terminator occurs within a word, follow the basic contraction rules.
Cindi