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

Ex Input:
Retinoic acid regulates oral epithelial differentiation by _ mechanisms.

Ex Output:
two


Ex Input:
Most smokers try to quit at least _ or six times before they succeed, researchers say.

Ex Output:
five


Ex Input:
Subsistence farming is the primary occupation for more then _ million inhabitants.

Ex Output:

five