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

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

Ex Output:
two


Ex Input:
Time is _ less a dimension of our universe than is length, width, and height.

Ex Output:
no


Ex Input:
Most health professionals recommend approximately _ hours of sleep each night.

Ex Output:

eight