In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
--------
Question: Tapirs have hoofed toes, with four toes on the front feet and _ toes on the hind feet.

Answer: three


Question: Urushiol oil can be active on any surface for _ years and possibly longer.

Answer: five


Question: Horns are pyramidal peaks that form when several cirques chisel a mountain from _ or more sides.

Answer:
three