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:
Scorpions have ____ legs.

Ex Output:
eight


Ex Input:
Elephants also have four molars, ____ on the top and one on the bottom on both sides of the mouth.

Ex Output:
one


Ex Input:
Carbon atoms are tetravalent, and therefore, can have ____ bonding pairs around each carbon atom.

Ex Output:

four