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

Example Input: Pangolins walk on all _ of their stout limbs, which are adapted for digging.
Example Output: four

Example Input: English peas are about _ feet high and blooming.
Example Output: two

Example Input: Sexual selection has _ components, intrasexual competition and intersexual selection.
Example Output:
two