Given a string text, return the first word that repeats when scanning from left to right. Comparison should be case-insensitive, and punctuation should be ignored. If no word repeats, return an empty string.
Constraints
1 <= len(text) <= 10^5
text contains letters, digits, spaces, and punctuation
Word matching is case-insensitive
Ignore leading, trailing, and repeated punctuation around words
Function Signature
deffirst_repeated_word(text):
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