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

Ex Input:
Wild alfalfa is fairly drought resistant, with roots going down _ feet.

Ex Output:
ten

Ex Input:
Titanium is found in column _ along with chemically similar zirconium, hafnium, and thorium.

Ex Output:
four

Ex Input:
Water lilies vary in cover from _ to twenty-four square feet each.

Ex Output:
four