How do you appreciate the scientists Aufbau and Hund?

Explanation

1) Aufbau and Hund are great scientists and they proposed Aufbau principle and Hund's rule to describe the electronic configuration for more than one electron in the atom.
2) Aufbau principle stated that the orbitals are filled with electrons in the order of increasing energy.
3) According to Hund's rule electron pairing in orbitals starts only when all available empty orbitals of the same energy or degenerated orbitals are singly occupied.
4) Both the scientists contributed their efferts in the understanding of the atomic structure and the electronic configuration of an atom.
5) So, I appreciate both of them.