In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Input: Consider Input: Bilinear interpolation uses a weighted average of the _ nearest pixels.

Output: four


Input: Consider Input: Flatworms exhibit _ forms of life styles, free-living and parasitic.

Output: two


Input: Consider Input: American women are _ times more likely to die of breast cancer than Japanese women.


Output: four