import re
 
pattern = r"^\] prima 1 (?!\d+\b)\w+(?: (?!\d+\b)\w+)* 2 (?!\d+\b)\w+(?: (?!\d+\b)\w+)*$"
 
test_str = ("] prima 1 words 2 words\n"
	"] prima 1 9words 2 words\n"
	"] prima 1 words 2 words 3 words\n\n"
	"] prima 1 words another word that does not start with three or four 2 words that does not start with a number three or four\n"
	"] prima 1 words 2 words 4 words\n\n\n"
	"] prima 1 words 2 words\n"
	"] prima 1 2 2 1\n"
	"] prima 1 words 2 words 3 words")
 
regex = re.compile(pattern, re.MULTILINE)
matches = regex.findall(test_str)
print(matches)

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