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:
Dogs are pack animals, and ____ dogs is the minimum number for proper socialization.

Ex Output:
five


Ex Input:
Hares hold their young ____ to ten days longer.

Ex Output:
seven


Ex Input:
Most atoms have ____ or more such shells.

Ex Output:

two