original_query: What does the wheel arrangement "8,4-8" represent in the Whyte notation for steam locomotives?
query: What does the wheel arrangement "4-8-2" represent in the Whyte notation for steam locomotives?
answer: In the Whyte notation, the wheel arrangement 4-8-2 represents four leading wheels, eight powered and coupled driving wheels, and two trailing wheels. This type is commonly known as the Mountain type.