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

Ex Input:
Hoatzin has typical foot with _ toes forwards and one backwards.

Ex Output:
three


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:
Arabian oryx are the smallest oryx, measuring _ feet high at the shoulder.

Ex Output:

four