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

Input: Consider Input: Degradation is a result of _ simultaneous processes.

Output: two

Input: Consider Input: Mares normally give birth to their first foal when they are between _ and six years of.

Output: three

Input: Consider Input: Ruminants have a fore-stomach with _ chambers.
Output: four