I recently dived into containers and kubernetes

I am trying to set an environment variable so that it will randomly or selectively choose from a list of words...

so say I have 1 pod which returns "hello world"

If I set a custom variable as RETURN_THIS = ["world", "kubernetes", "universe"]

if i scale to 3, then the second pod will return "hello kubernetes" and the third will return "hello, universe"

if I add another.. it would return "hello world"

and so forth

Any ideas on how I might be able to do this?