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

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

Output: one

Input: Consider Input: Older caterpillars have _ different color forms.

Output: two

Input: Consider Input: Wiccan witches practice _ kinds of magic.
Output: two