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: Elephants have five toes on the fore feet and ____ on the hind feet.

SOLUTION: four

PROBLEM: Lions stand ____ feet tall at the shoulders.

SOLUTION: three

PROBLEM: Most people urinate four to ____ times per twenty four-hour period.

SOLUTION:
eight