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

Example Input: Acrobats mount a single bicycle until _ people in all are stacked on top of it.
Example Output: ten

Example Input: Every drug has _ names, a chemical name, a brand name, and an official name.
Example Output: three

Example Input: Reality exists in more than _ dimensions and there are many, many different sexes.
Example Output:
four