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