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:
Spermatogenesis creates ____ sperm of equal size.

Ex Output:
four


Ex Input:
Success is a function of ____ things.

Ex Output:
two


Ex Input:
Young nymphs have three horns instead of the ____ seen on the adults.

Ex Output:

one