import re
 
def extract_all_after_pattern(search_after_rx, reg, text):
    search_after = re.search(search_after_rx, text)
    if search_after:
        print(f"Found at {search_after.start()}, searching from {len(search_after.group())}, i.e. in '{text[search_after.end()+1:]}'")
        return reg.findall(text, search_after.end()+1)
    else:
        return []
 
text = "we have a Newliner Chatacter in 10000 the Middle of the sentence"
search_after_rx = r'\ba\b' # Or, r'a\s', r'\sa\s', r'(?<!\S)a(?!\S)', etc.
reg = re.compile(r'\w+')
print(extract_all_after_pattern(search_after_rx, reg, text))

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