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

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

Ex Output:
four


Ex Input:
Gravity is the weakest of all _ forces but unlike the others it has an unlimited range.

Ex Output:
four


Ex Input:
Biennials require _ growing seasons to complete their life cycle.

Ex Output:

two