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

Ex Input:
Sea urchins have _ paired rows of tiny tube feet which are found amongst the spines.

Ex Output:
five


Ex Input:
Covalent bonds arise when _ atoms share electrons .

Ex Output:
two


Ex Input:
Yoga recognizes _ separate forms of breathing - diaphragmatic, intercostal, and clavicular.

Ex Output:

three