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

Example Input: Hoof balance is _ dimensional geometry.
Example Output: four

Example Input: Allergic rhinitis is the most common allergic disease, with one in _ Canadian adults affected.
Example Output: five

Example Input: Arbitration is a process where one or _ arbitrators make a decision about the case.
Example Output:
three