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

Example Input: Air resistance is _ at zero velocity.
Example Output: zero

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

Example Input: Breast cancer is the most common cancer among women, accounting for _ in three cancers diagnosed.
Example Output:
one