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

Example Input: Germs have _ means of locomotion execpt to attach themselves to particles of dust.
Example Output: no

Example Input: Sake contains _ preservatives or sulfites.
Example Output: no

Example Input: Most infections are mild and produce either _ symptoms or a minor influenza- like illness.
Example Output:
no