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:
Finches breed when the female is over one year old and the male is under ____ year old.

Ex Output:
five


Ex Input:
Most internal parasites are specific to one or ____ species.

Ex Output:

two