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

Ex Input:
Most litters have two to _ kittens.

Ex Output:
four


Ex Input:
Most orangutans are four to _ feet long, some can reach a length of six feet.

Ex Output:
five


Ex Input:
Chlorine has a shelf life of _ months, so be sure to use fresh bleach.

Ex Output:

six