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

Ex Input:
Some species bear living offspring only every _ to five years.

Ex Output:
three


Ex Input:
Comets are a bit like giant dirty ice-balls with diameters between _ and fifty kilometres.

Ex Output:
five


Ex Input:
Arterial insufficiency is characterized by _ types of pain.

Ex Output:

two