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: Human malaria is caused by ____ species of Plasmodium . .

Output: four


Input: Consider Input: Distance Reports the distance between the last ____ picked atoms.

Output: two


Input: Consider Input: Reproductive maturity is reached at four to ____ years in females and seven to nine years in males.


Output: six