Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Ex Input:
All matter exists in ____ dimensional space, both internal and external.

Ex Output:
three


Ex Input:
Mollusks have one or ____ hearts.

Ex Output:
two


Ex Input:
Liquid crystals lack the full ____ dimensional position and orientation order of ordinary crystals.

Ex Output:

three