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

Ex Input:
Most people go back to work within _ to three months after having a heart attack.

Ex Output:
one


Ex Input:
Cubs stay with their mothers for up to _ years.

Ex Output:
three


Ex Input:
Angiosperms comprise _ separate groups, monocots and dicots.

Ex Output:

two