Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Input: Consider Input: Tin has ____ allotropic forms.

Output: two


Input: Consider Input: Neuroblasts delaminate in five waves spanning approximately ____ hours.

Output: three


Input: Consider Input: Sensation overlaps the ____ fields of mind and matter.


Output: two