Determine the functional group of the following molecule.
CH3-CH2-COOH
The functional group in the molecule CH3-CH2-COOH is a carboxyl group (-COOH).
Complete the following task based on the instruction and optional input provided.### Instruction:
Determine the functional group of the following molecule.

### Input:
CH3-CH2-COOH

### Output:
The functional group in the molecule CH3-CH2-COOH is a carboxyl group (-COOH).