How to modify a regular expression in which all + before a vowel are replaced with a void, except in exceptional situations?

Question

Python

Regular Expression: r'\+(?i)([aeeiouyeyyuya])'
Exception: hello +y

Texts:
x+hello++y
hello+y
l+i+string+signs+n+a d+o delete+ t
but + here + everything + ve + rno 2

+ 2 = 4

Answer 1

r'\+(?i)([аеёиоуыэюя])(?<!о.у)'