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:
Pinks live only ____ years.

Ex Output:
two


Ex Input:
Sexual maturity is reached between ____ months of age to a year old.

Ex Output:

nine