-0-2-2

An 0-2-2, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is one that has two coupled driving wheels followed by two trailing wheels, with no leading wheels. The configuration was briefly built by Robert Stephenson and Company for the Liverpool and Manchester Railway

Other equivalent classifications are:

UIC classification: A1 (also known as German classification and Italian classification)
French classification: 011
Turkish classification: 12
Swiss classification: 1/2