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:
Light chains exist in ____ classes, lambda and kappa.

Ex Output:
two

Ex Input:
Eyes are small with ____ eyebrows or lashes.

Ex Output:
no

Ex Input:
Most people become ill ____ to seven days after infection.

Ex Output:
two