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

Example Input: Cubs stay with their mothers for up to _ years.
Example Output: three

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

Example Input: Wolves usually rear their pups in dens for the first _ weeks.
Example Output:
six