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:
Aardvarks have ____ toes on the front feet and five toes on their back feet.

Ex Output:
four


Ex Input:
Insects are identified by having ____ sets of paired legs, while isopods have seven.

Ex Output:
three


Ex Input:
Bees have ____ legs and three body parts.

Ex Output:

six