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

Ex Input:
Acute sinusitis is any infectious process in the sinus lasting from one day to _ weeks.

Ex Output:
three


Ex Input:
Trees begin to bear _ to seven years after planting the root shoot.

Ex Output:
five


Ex Input:
Space is defined by at least _ identical particles.

Ex Output:

four