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

Ex Input:
Most turbines have either _ or three blades.

Ex Output:
two


Ex Input:
Some barnacles can feed in _ modes.

Ex Output:
two


Ex Input:
Proboscis monkeys live in-groups of _ to fifteen with an adult male as their leader.

Ex Output:

five