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:
Warts have a finite life span of anywhere from six months up to ____ years.

Ex Output:
five


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

Ex Output:
five


Ex Input:
Carbon is unique for ____ main reasons.

Ex Output:

two