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:
Sealants can normally last up to ____ years and hold up very well under normal chewing.

Ex Output:
five


Ex Input:
Natural ytterbium is a mixture of ____ stable isotopes, with seven other unstable isotopes known.

Ex Output:
seven


Ex Input:
Most mothers give birth to one young an average of every five to ____ years in the wild.

Ex Output:

six