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

Ex Input:
Mares generally give birth to one young every _ years.

Ex Output:
three


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

Ex Output:
one


Ex Input:
Tapirs have hoofed toes, with four toes on the front feet and _ toes on the hind feet.

Ex Output:

three