Arrange the following list of animals based on their size.
Lion, Elephant, Frog, Rat
Frog, Rat, Lion, Elephant.
Complete the following task based on the instruction and optional input provided.### Instruction:
Arrange the following list of animals based on their size.

### Input:
Lion, Elephant, Frog, Rat

### Output:
Frog, Rat, Lion, Elephant.