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

Ex Input:
Monarch caterpillars have _ pairs of tentacles.

Ex Output:
two


Ex Input:
Black women giving birth have a four to _ higher rate of mortality than white women do.

Ex Output:
one


Ex Input:
Mature trees give shelter with _ natural swimming holes safe for the young.

Ex Output:

three