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: Acoustic instruments consist of ____ main parts neck, top, back and sides.

Output: four


Input: Consider Input: Variable stars fall into ____ major physical classifications.

Output: four


Input: Consider Input: Pickpockets often work in teams of ____ or three.


Output: two