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

Input: Consider Input: Some people routinely sleep only _ hours a night but feel fine during the day.

Output: four


Input: Consider Input: Diffusion occurs between the capillaries of the _ blood supplies.

Output: two


Input: Consider Input: Ladybugs have _ legs and keep their wings tucked away until they are ready to fly.


Output: six