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:
Tetrads come in ____ shapes.

Ex Output:
seven


Ex Input:
Owls have ____ toes on each foot, like most birds.

Ex Output:
four


Ex Input:
Autism is generally evident by age ____ and adversely affects learning experiences.

Ex Output:

three