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:
Photons have momentum but ____ mass or electrical charge.

Ex Output:
no


Ex Input:
Sapsuckers are a group of ____ species known for literally drinking the sap of trees.

Ex Output:
four


Ex Input:
Most adults experience five or ____ sleep cycles each night.

Ex Output:

six