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

Ex Input:
Plants have many white flowers with _ petals, giving the plant a white, flat-topped appearance.

Ex Output:
four


Ex Input:
Prolactin exists in _ heterogenic forms which possess varying biological activity.

Ex Output:
three


Ex Input:
Territorial groups consist of _ supermale or terminal male and one to three females.

Ex Output:

one