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

Input: Consider Input: Prolactin exists in _ heterogenic forms which possess varying biological activity.

Output: three


Input: Consider Input: Most cats have only four to _ toes per paw, depending on whether it is the front or back paw.

Output: five


Input: Consider Input: Grasshoppers can jump two feet high and _ feet forward.


Output: four