In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Ex Input:
Pets also track in pollen, and _ out of every ten people is allergic to cat or dog dander.

Ex Output:
one


Ex Input:
Most amphibians reach maturity at three or _ years.

Ex Output:
four


Ex Input:
Orange trees have dark green shiny leaves and small white flowers with _ petals .

Ex Output:

five