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

Ex Input:
Mental illness affects _ out of four families in America.

Ex Output:
one


Ex Input:
Sturgeons are shark-like in form but are unique in having _ rows of bony plates along the body.

Ex Output:
five


Ex Input:
Gastrulation produces a gastrula that develops _ embryonic germ layers.

Ex Output:

three