In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Example Input: Death usually occurs by five to _ years of life due to pneumonia or other infections.
Example Output: eight

Example Input: Bifocal lenses have _ distinct segments with different powers.
Example Output: two

Example Input: Cheetahs live alone or in small groups numbering up to _ individuals.
Example Output:
six