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: Earth is the third planet from the Sun in our solar system, which includes ____ other planets.

SOLUTION: seven

PROBLEM: Elderberry supplements seem to have few risks when used daily for up to ____ days.

SOLUTION: five

PROBLEM: Inhibitors are of ____ different types.

SOLUTION:
two