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

Input: Consider Input: Some people routinely sleep only _ hours a night but feel fine during the day.

Output: four


Input: Consider Input: Roundworms are fairly large worms that can grow to be _ or five inches long.

Output: four


Input: Consider Input: Dubnium has _ recognized isotopes.


Output: seven