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

Input: Consider Input: Every insect has _ legs, has six legs, has six legs.

Output: six


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

Output: four


Input: Consider Input: Tangent Creates a surface tangent to _ adjacent surfaces.


Output: two