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

SOLUTION: five

PROBLEM: Bullying is most severe in grades ____ to nine.

SOLUTION: seven

PROBLEM: Wolves disperse from their family pack before they turn ____ years old and some roam far away.

SOLUTION:
three