Answer:
What goes up when the rain comes down?
What has one head, one foot, and four legs?
They are toothy nocturnal immortals.
What has no hands but might knock on your door, and if it does you better open up?
What is it that after you take away the whole, some still remains?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?