Umm why

Thank you. I should have seen the full range table.

What's mean about water invert arrows? Where is the arrow? I’m stucked please.

I stucked few days anyone help me.

I solved it by accident,

I can not have any idea.
Is that a matter of thinking about the logical shape? Or need completely different idea ?

I solved thank you.

I can not understand. What mean about gravity. How affect two keys.

I have the key.31. But how it to use ?

Each group seems.