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:
Threshold is a value to avoid ____ divide.

Ex Output:
zero


Ex Input:
Birds have ____ beak, two wings, and two feet.

Ex Output:
one


Ex Input:
Caterpillars have ____ true legs.

Ex Output:

three