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: Presidential elections take place every ____ years.

SOLUTION: four

PROBLEM: Rabbits can live to be around ____ years old or older.

SOLUTION: ten

PROBLEM: Invidual variables consist of ____ lowercase letter, followed by zero or more letters or digits.

SOLUTION:
one