Separate the following list into categories of animals and plants.
Cat, Dog, Oak Tree, Maple Tree
Animals: 
Cat, Dog

Plants:
Oak Tree, Maple Tree
Complete the following task based on the instruction and optional input provided.### Instruction:
Separate the following list into categories of animals and plants.

### Input:
Cat, Dog, Oak Tree, Maple Tree

### Output:
Animals: 
Cat, Dog

Plants:
Oak Tree, Maple Tree