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:
Fossil fuels come in ____ major forms coal, oil and natural gas.

Ex Output:
three


Ex Input:
Pyrimidines contain ____ ring and purines contain two rings.

Ex Output:
one


Ex Input:
Indian subcontinent is surrounded by ____ seas i.e., in the East, South and West.

Ex Output:

three