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

Ex Input:
Essential oils have a non-toxic, residual effect of up to five months from just _ application.

Ex Output:
one


Ex Input:
Sociobiology is the historical outgrowth of _ prerequisite trends.

Ex Output:
three


Ex Input:
Electromagnetic changes are at the speed of light and reach Earth within _ minutes.

Ex Output:

eight