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: Wood consists of ____ distinct fuels.

SOLUTION: two

PROBLEM: Amphibians have ____ legs, and often look like reptiles.

SOLUTION: four

PROBLEM: Most starfish have ____ arms, but a few species have more, as many as fifty arms.

SOLUTION:
five