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:
Crustaceans have ____ pairs of antennae.

Ex Output:
two

Ex Input:
Cleavage is good in ____ directions at right angles.

Ex Output:
two

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

Ex Output:
three