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.

Input: Consider Input: Biological islands are of ____ general types, geographical and ecological.

Output: two


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

Output: six


Input: Consider Input: All children normally wake up four or ____ times each night after dreams.


Output: five