Problem regarding mentioning the potential in LAMMPS

Dear LAMMPS users

I have started working with LAMMPS recently. I want to use Buckingham potential. I have all the parameters (A, rho, C and cut off). But I want to know how can I mention parameters separately for A-A type, A-B type and A-O type interaction. How The software differentiate among these interaction these interactions. Kindly help me with the syntax of this command.

Regards
Afza Shahid

Dear LAMMPS users

I have started working with LAMMPS recently. I want to use Buckingham
potential. I have all the parameters (A, rho, C and cut off). But I want to
know how can I mention parameters separately for A-A type, A-B type and A-O
type interaction. How The software differentiate among these interaction
these interactions. Kindly help me with the syntax of this command.