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:
R is an average of the color rendering ability of ____ or more specific colors.

Ex Output:
eight


Ex Input:
Tuberculosis develops in ____ stages.

Ex Output:
two


Ex Input:
Bacteria are of ____ groups eubacteria and archae bacteria.

Ex Output:

two