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:
Most people stay three or four years, sometimes five or ____ years.

Ex Output:
six


Ex Input:
Ligand seeks ____ receptors into binding and mutual phosporylation.

Ex Output:
two


Ex Input:
Robins have ____ broods a year.

Ex Output:

two