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:
Neutrons consist of one up quark and ____ down quarks.

Ex Output:
two


Ex Input:
White chocolate is a confection of fat and sugar and contains ____ antioxidants at all.

Ex Output:
no


Ex Input:
Chitons have a shell composed of ____ separate shell plates or valves .

Ex Output:

eight