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

Ex Input:
Human sperm comes in _ varieties, mixed.

Ex Output:
three


Ex Input:
Most orangutans are four to _ feet long, some can reach a length of six feet.

Ex Output:
five


Ex Input:
Drugs of abuse have at least _ categories of effects.

Ex Output:

two