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: Some botanists recognise ____ botanical varieties.

Output: two


Input: Consider Input: Gliders produce at least ____ distinct odors.


Output: three