Input: Oxygen, Helium, Carbon

Here is the symbol and atomic number of each element:
- Oxygen (Symbol: O, Atomic Number: 8)
- Helium (Symbol: He, Atomic Number: 2)
- Carbon (Symbol: C, Atomic Number: 6)
Oxygen, Helium, Carbon
### Instruction:
Given a set of chemical elements, output the symbol and atomic number of each element.

### Input:
Oxygen, Helium, Carbon

### Response:
