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

Ex Input:
Gerbils get reproductive when they reach sexual maturity at the age of _ months.

Ex Output:
three

Ex Input:
Eagles attain their adult plumage at _ or five year of age.

Ex Output:
four

Ex Input:
Malaria still kills nearly _ million people globally each year.

Ex Output:
two