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: Bilinear interpolation uses a weighted average of the _ nearest pixels.

Output: four


Input: Consider Input: Many scientists believe that, sometime around _ billion years ago, simple life arose.


Output: four