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

Ex Input:
Most broaches have _ series of teeth.

Ex Output:
three


Ex Input:
Climatic regions Contrasts between the interior and the coasts produce _ main climatic regions.

Ex Output:
six


Ex Input:
Autism is a developmental disability identified during the first _ years of life.

Ex Output:

three