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:
Body language is used when ____ words can express what the person is trying to communicate.

Ex Output:
no


Ex Input:
Nymphs are less than ____ millimeters in size.

Ex Output:
two


Ex Input:
Nodes are points in space that have ____ probability for locating an electron there.

Ex Output:

zero