Simplify the following text for a Grade 10 native English-speaking person.
Original: The rank of SS-Junker was divided into four levels , those being Junker , Oberjunker , Standartenjunker , and Standartenoberjunker .
Simplified: The rank of SS-Junker was split into four levels , those being Junker , Oberjunker , Standartenjunker , and Standartenoberjunker .