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: Tuberculosis develops in ____ stages.

Output: two


Input: Consider Input: Zygospores result from the fusion of ____ similar hyphal elements.

Output: two


Input: Consider Input: Night crawlers can live long lives, with a reported average life span of six to ____ years.


Output: nine