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.

Pertussis is highly contagious with symptoms that can linger ____ to ten weeks.
six

Early childhood refers to the time period between birth and ____ years of age.
eight

Hyphenated words are words that are formed from ____ words.

two