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: International mail consists of ____ categories of mail.

Output: three


Input: Consider Input: Cesarean section are three to ____ times more likely for pregnant women with diabetes.

Output: four


Input: Consider Input: Perennial grass takes ____ to five years before it is mature enough to produce adequate seed.


Output: three