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

Example Input: Ticks are small round arachnids with _ legs and can have either a soft or hard body.
Example Output: eight

Example Input: Every muscle is made up of _ types of fibers.
Example Output: two

Example Input: Diatoms look like _ shells that fit together.
Example Output:
two