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

Ex Input:
Dwarf trees are diminutive and shrub-like, reaching _ feet or so at maturity.

Ex Output:
four


Ex Input:
Cockroaches require food every _ to ten days but mut take in water every ten days.

Ex Output:
seven


Ex Input:
Symmetric algorithms use secret keys shared by _ different users.

Ex Output:

two