[Python] Use of OR (|) does not return results equal to the individual regexes

Here's the problem statement:

Return the original text where in that original text:

1. after each consonant a random vowel has been inserted
2. after each vowel, the vowel has been replicated twice

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And what I've tried:

text = "hieeelalaooo" #original string is hello
pat1 = "(?=[^aeiouy][aeiouy])\\w" #const then random vowel
ans1=re.findall(pat1,text)
#ans1 = ['h', 'l', 'l']
pat2 = "([aeiouy])\\1\\1" #vowel replicated twice
ans2=re.findall(pat2,text)
#ans2 = ['e', 'o']
ans = re.findall(pat1 + "|" + pat2, text)
#ans = ['', 'e', '', '', 'o']


I was hoping that ans would be 'hello'. I'm sure there are a numerous ways to meet the goal, but I'm interested in why this doesn't work.

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