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: Pyrimidines contain ____ ring and purines contain two rings.

Output: one


Input: Consider Input: Friendship means to trust ____ or more people.

Output: two


Input: Consider Input: Women are ____ times more likely to have bone thinning than men.


Output: four