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: Some airports have ____ parallel runways.

Output: two


Input: Consider Input: Fuzzy logic is an attempt to combine the ____ techniques.

Output: two


Input: Consider Input: All plant organs contain the same ____ primary tissues.


Output: three