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

Ex Input:
Most people stay three or four years, sometimes _ or six years.

Ex Output:
five


Ex Input:
Every drug has _ names, a chemical name, a brand name, and an official name.

Ex Output:
three


Ex Input:
Baby gorillas stay with their moms until they're _ years old.

Ex Output:

three