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

Ex Input:
Boolean operations is a method of combining _ meshes together.

Ex Output:
two


Ex Input:
Architectural shingles are twice or _ times as thick as ordinary shingles.

Ex Output:
three


Ex Input:
Critters are our handmade teddy bears in _ sizes.

Ex Output:

three