import re
pattern = r'\b(?=\d+ (?:year|month|day))(?:\d+ years?)?(?:\s+\d+ months?)?(?:\s+\d+ days?)?\b'
m = re.search(pattern, 'in 2 years 25 days')
if m:
print(m.group())
aW1wb3J0IHJlCgpwYXR0ZXJuID0gcidcYig/PVxkKyAoPzp5ZWFyfG1vbnRofGRheSkpKD86XGQrIHllYXJzPyk/KD86XHMrXGQrIG1vbnRocz8pPyg/OlxzK1xkKyBkYXlzPyk/XGInCm0gPSByZS5zZWFyY2gocGF0dGVybiwgJ2luIDIgeWVhcnMgMjUgZGF5cycpCmlmIG06CiAgICBwcmludChtLmdyb3VwKCkp