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

Input: Consider Input: Porphyritic textures form primarily because of _ rates of cooling.

Output: two


Input: Consider Input: Uncontrolled diabetes can increase risk by up to _ times.

Output: four


Input: Consider Input: Arthropods are made up of _ groups of living animals and one group of extinct animals.


Output: four