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

Input: Consider Input: Cockatiels average _ to five eggs per nest, with an egg typically laid every other day.

Output: four

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

Output: ten

Input: Consider Input: Young worms mature in the large intestine in three to _ months, then begin the cycle anew.
Output: four