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: Niobium occurs primarily in ____ minerals, columbite and pyrochlore.

Output: two


Input: Consider Input: Binary distillation is a separation of only ____ chemicals.

Output: two


Input: Consider Input: Sexual reproduction is varied in ____ ways.


Output: three