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

Input: Consider Input: All insects have _ pairs of legs and adult wings.

Output: three


Input: Consider Input: Frozen grafts can have a shelf life of up to _ years.

Output: five


Input: Consider Input: Breastfed babies tend to grow faster than formula-fed babies in the first _ months of life.


Output: four