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

Input: Consider Input: Woodchucks can dig up to three entrances to _ den.

Output: one

Input: Consider Input: Female cats become sexually mature between _ and twelve months of age.

Output: seven

Input: Consider Input: Water is forced through a system which breaks it into drops as small as _ microns.
Output: five