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

Ex Input:
Germs have _ means of locomotion execpt to attach themselves to particles of dust.

Ex Output:
no


Ex Input:
Salt has at least _ unique qualities.

Ex Output:
three


Ex Input:
Water is the only substance on earth found naturally in _ forms - solid, liquid, and gas.

Ex Output:

three