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: Calcite makes up ____ well known rocks limestone and marble.

Output: two


Input: Consider Input: Marsupials have ____ vaginas and a double uterus.

Output: two


Input: Consider Input: Most spiders have eight eyes, although some have ____ or two.


Output: six