Generators: X Y T; Weights: 1 1 1; <*Limiting weight: 6;*> Parameters: c_1 c_2 c_3; Relations: 2 [[Y,X],Y] + c_2 [Y, X]; [[Y,X],X] + c_1 [Y, X] + [T,Y]; [T,X] + c_3 Y;