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

Example Input: Smokers tend to become disabled and retire early _ times more than non-smokers.
Example Output: six

Example Input: Binary distillation separates _ chemicals.
Example Output: two

Example Input: Anthrax incubates silently in the body for _ days to several weeks after exposure.
Example Output:
three