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:
World population continues to rise, even as a few countries move toward ____ growth.

Ex Output:
zero


Ex Input:
Mature plants can be up to ____ feet tall.

Ex Output:
six


Ex Input:
Most children are able to speak fluently by five to ____ years of age.

Ex Output:

six