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

Input: Consider Input: Diatoms are in _ shells and make the water brown.

Output: two


Input: Consider Input: Daisy chains consist of three to _ or more small artificial squid in various colors.

Output: five


Input: Consider Input: Photoelectric cells are of _ kinds, vacuum and gas-filled.


Output: two