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

Ex Input:
Faith then has _ elements - knowledge, belief, and trust.

Ex Output:
three


Ex Input:
Many prosimians have at least _ nipples and produce litters rather than a single offspring.

Ex Output:
four


Ex Input:
Heavy chain has _ V region and three or more C-regions.

Ex Output:

one