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

Input: Consider Input: Figure skating is like flying, but it's also like climbing hundreds of stairs in _ minutes.

Output: four


Input: Consider Input: Most insects have _ wings, but dipterans have only two.

Output: four


Input: Consider Input: Psychiatrists say that one in _ people is mentally ill.


Output: four