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

Ex Input:
Brown bears grow from six and a half to _ feet long.

Ex Output:
nine


Ex Input:
All hairs have a life expectancy of _ to six years.

Ex Output:
three


Ex Input:
Maxillary molars have two buccal cusps and _ lingual cusps.

Ex Output:

two