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

Ex Input:
Compound machines are _ or more simple machines working together.

Ex Output:
two


Ex Input:
Postpartum blues are common during the _ months after childbirth.

Ex Output:
three


Ex Input:
Beavers have an average of _ young once a year.

Ex Output:

four