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

Ex Input:
Mares normally give birth to their first foal when they are between _ and six years of.

Ex Output:
three


Ex Input:
Unipolar motors have _ coils and are likely to have five or six wires attached.

Ex Output:
four


Ex Input:
Sunspots usually come in groups with _ sets of spots.

Ex Output:

two