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

Ex Input:
Ostrichs only have _ toes, and one toenail.

Ex Output:
two

Ex Input:
Pelagic division is divided into neritic and _ levels of pelagic provinces.

Ex Output:
three

Ex Input:
Transcription occurs in _ stages, initiation, elongation, and termination.

Ex Output:
three