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

Input: Consider Input: Humans seem to be able to sense at least _ forms of energy.

Output: eight


Input: Consider Input: Cities have various sizes, and can contain from _ to four armies depending on size.

Output: one


Input: Consider Input: Saliva consists of _ fluids, 'mucous' and 'serous'.


Output: two