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

Ex Input:
Vitamins are classified into _ groups.

Ex Output:
two


Ex Input:
Most people breathe so poorly that they average between _ and thirty breaths a minute.

Ex Output:
ten


Ex Input:
Today there are _ major systems of naming herbs, including medicinal herbs.

Ex Output:

three