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

Ex Input:
Every earmark consists of a symbol in _ positions.

Ex Output:
two


Ex Input:
Communion is that which is shared between the _ persons of the Holy Trinity.

Ex Output:
three


Ex Input:
Mammals typically have _ parathyroid glands, while other types of animals typically have six.

Ex Output:

four