TASK DEFINITION: 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.
PROBLEM: Some programming languages have ____ or more standards .

SOLUTION: two

PROBLEM: Penguins have ____ seasons in their year, as follows.

SOLUTION: four

PROBLEM: Rabbits have ____ incisors in the upper jaw where rodents have only two.

SOLUTION:
four