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

Input: Consider Input: Women devote their lives to raising families of six, seven and _ children.

Output: eight

Input: Consider Input: Diarrhea is an illness that kills _ and one-half million children per year.

Output: three

Input: Consider Input: Rats deprived of all sleep survive only about _ weeks.
Output: three