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

Input: Consider Input: Muslim men can divorce by simply pronouncing triple talak and can have up to _ wives.

Output: four

Input: Consider Input: Black people live about _ fewer years, on average, than white people do.

Output: six

Input: Consider Input: Insomnia can be short-lived, lasting only _ to two nights.
Output: one