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: Most organ systems are operational in the fetus by ____ to six months.

Output: four


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

Output: four


Input: Consider Input: Structural cohesion is also of ____ different sorts.


Output: two