The only exception is the letter A, which appears in the list – unlike the other vowels – and contains fi ve words beginning with the fi ve vowels: a – abbas (abbot), e – eques (knight), i – institor (tax-collector), o – offi cialis (ecclesiastical judge), and u – usurarius (usurer).
Here he's interestingly removed the vowels, which is certainly reminiscent of the later Major System structure in at least some respect.