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

Input: Consider Input: Mountain zebras can live up to _ days without drinking water.

Output: three


Input: Consider Input: Essential oils have a non-toxic, residual effect of up to five months from just _ application.

Output: one


Input: Consider Input: Prostate cancer is categorized in _ stages.


Output: four