import re
text = "126 2225xx009"
rx_alnum = r"\b(?:[a-z]+[0-9]+|[0-9]+[a-z]+)[a-z0-9]*\b"
rx_digits = r"\d+"
alphanumeric_text = re.sub(rx_alnum, lambda x: " ".join(x.group()), text)
print(alphanumeric_text)
numeric_text = text = re.sub(rx_digits, lambda x: " ".join(x.group()), alphanumeric_text )
print(text)