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

Example Input: Cancer can start in any of the _ sections or where the colon ends in the rectum.
Example Output: four

Example Input: Sexual reproduction combines the genetic materials of _ plants.
Example Output: two

Example Input: All spiders have _ pairs of legs and a set of leg-like appendages called palps.
Example Output:
four