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: Ocean has ____ life-important properties.

Output: two


Input: Consider Input: Camels run about ____ feet tall.


Output: seven