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:
Arthropods are made up of ____ groups of living animals and one group of extinct animals.

Ex Output:
four


Ex Input:
Most ovarian cysts go away on their own in ____ to three months without causing any problems.

Ex Output:
one


Ex Input:
Marriage is the holy reality of ____ becoming one.

Ex Output:

two