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.

Example Input: Body temperature attains ambient levels within four to ____ hours.
Example Output: six

Example Input: Traffic lights have ____ colors.
Example Output: three

Example Input: Most dens are oval shape, six to nine feet long and about ____ feet in height and width.
Example Output:
six