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

Ex Input:
Most insects have _ wings, but dipterans have only two.

Ex Output:
four


Ex Input:
Yeasts are of _ kinds.

Ex Output:
two


Ex Input:
Catbirds are usually around _ inches in length and common in undergrowth, brush, and gardens.

Ex Output:

nine