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:
All crabs have ____ pair of chelipeds and four pairs of walking legs .

Ex Output:
one


Ex Input:
Most bacteria have one or ____ circular chromosomes.

Ex Output:
two


Ex Input:
Rotation spins an object around the ____ axes.

Ex Output:

three