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

Input: Consider Input: Fluoroscopy has _ magnification modes and image capture.

Output: two


Input: Consider Input: Melanocytes are dendritic and are distributed roughly _ per six basal cells.

Output: one


Input: Consider Input: Some herpesvirus genomes exist as a mixture of _ isomers.


Output: four