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:
Sharks have ____ gill slits on each side of the head.

Ex Output:
five


Ex Input:
Differentiation is caused by the energy going in ____ directions.

Ex Output:
two


Ex Input:
Sprawl destroys ____ million acres of farmland every two years.

Ex Output:

one