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.

Ex Input:
Stems are of ____ types, flowering and vegetative.

Ex Output:
two


Ex Input:
Power is derived from ____ sources, money and people.

Ex Output:
two


Ex Input:
Neural tube develops into the spinal cord and brain in the first ____ weeks of pregnancy.

Ex Output:

four