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: Hamsters can live to be ____ to four years old.

Output: three


Input: Consider Input: Differentiation is caused by the energy going in ____ directions.

Output: two


Input: Consider Input: Distance Refers to the relative positions of ____ opposing fencers.


Output: two