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

Input: Consider Input: Cigarette smokers have up to a _ times higher incidence of bladder cancer than non-smokers.

Output: four


Input: Consider Input: Sex is something _ people have.

Output: two


Input: Consider Input: Sums is an electronic scoresheet to keep track of scores for up to _ people.


Output: four