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

Ex Input:
Humans brains are about _ times bigger than in chimpanzees.

Ex Output:
three


Ex Input:
Rodents have _ toes on their front feet and five on the hind feet.

Ex Output:
four


Ex Input:
Water is moved underneath the body by most or all of the _ arms.

Ex Output:

eight