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:
Narwhals have ____ teeth in their upper jaw.

Ex Output:
two

Ex Input:
Neuroblasts delaminate in five waves spanning approximately ____ hours.

Ex Output:
three

Ex Input:
Bears stand on ____ feet.

Ex Output:
two