NUMBER OF MODELS: 9 MODEL 1 CHAIN: A CHAIN: B MODEL 2 CHAIN: A CHAIN: B MODEL 3 CHAIN: A CHAIN: B MODEL 4 CHAIN: A CHAIN: B MODEL 5 CHAIN: A CHAIN: B MODEL 6 CHAIN: A CHAIN: B MODEL 7 CHAIN: A CHAIN: B MODEL 8 CHAIN: A CHAIN: B MODEL 9 CHAIN: A CHAIN: B