import re
regex = re.compile(r"\b[a|b]{2}a[a|b]*b[a|b]{4}\b|\b[a|b]ba[a|b][a|b]{2}\b|\bb[a|b]{1}a[a|b]{2}\b")
test_str = "aaabaaaa abaaaa baaaa aabaaaa aaaaaaba"
matches = regex.finditer(test_str)
for match_num, match in enumerate(matches, start=1):
print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}")
for group_num, group in enumerate(match.groups(), start=1):
print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html