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

Example Input: Albino barbs are a light yellow with _ barely visible stripes.
Example Output: four

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

Example Input: Most water heaters have a life span of _ to fifteen years.
Example Output:
ten