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:
Nymphs go through ____ instars and a pupa stage before reaching adulthood.

Ex Output:
three


Ex Input:
Mature birds boast a wing span of ____ feet.

Ex Output:
six


Ex Input:
Most species have ____ arms coming from a central disk.

Ex Output:

five