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

Ex Input:
Pelycosaurs are a paraphyletic group of _ primitive families of synapsids.

Ex Output:
six


Ex Input:
Screws provide at least _ times the holding power of nails.

Ex Output:
seven


Ex Input:
Ovarian cancer has _ symptoms in the early stages.

Ex Output:

no