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

Example Input: Tapirs have hoofed toes, with four toes on the front feet and _ toes on the hind feet.
Example Output: three

Example Input: Sturgeons are shark-like in form but are unique in having _ rows of bony plates along the body.
Example Output: five

Example Input: Lead poisoning is especially dangerous in children ages _ months to six years old.
Example Output:
six