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

Example Input: Most intestinal worms take _ to four weeks for maturation from their larval stages into adults.
Example Output: three

Example Input: Most cats have only four to _ toes per paw, depending on whether it is the front or back paw.
Example Output: five

Example Input: Depression ranks among the top _ workplace problems following only family crisis and stress.
Example Output:
three