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

Ex Input:
Giraffes have two horns and _ or three knobs.

Ex Output:
two

Ex Input:
Involuntary manslaughter carries up to _ years in prison.

Ex Output:
five

Ex Input:
European cities tend to have population densities more than _ times that of U.S. urban areas.

Ex Output:
four