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: Couples spend ____ billion dollars a year on infertility treatments.

Output: two


Input: Consider Input: Light chains exist in ____ classes, lambda and kappa.

Output: two


Input: Consider Input: Loons eat approximately ____ pounds of fish each day.


Output: two