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: Smoking causes lung cancer in ____ ways.

Output: two


Input: Consider Input: Copper has ____ naturally occurring isotopes.

Output: two


Input: Consider Input: Microbiologists classify dermatophytes into ____ genera.


Output: three