Each vowel must be used once before another sequence of vowels can be used. … These can be in any order, AEIOU, IOUEA, AOUIE…

The Vowel Poem about vowel poems

A vowel is used only 1 unit at a time. To understand, do this: All must be incorporated. If up to the task, do it…

Airy beautiful thinking, a vowel constraint in few words

Aerious Eunoia!