0 w-w w-w e e e - 0 w w w-w w e-e e-w e e - e e e-w w q-w-w----0 w w w - w e-e r-r t t t - e q q q - q w w w - w 0-0-0 0 e-e----w-0 q - q---q-w e - e---e-w q - q---q-w e---- 8---- 0 q 8-8 8-8 q q w - w e e e - w e e e - e r-r-r e W-W-0 0 e-e----w-0 q - q---q-w e - e---e-w q - q---q-w w----8---- Q e-e e-e r r r - Q e e e-e e r-r r-e r-r r-r r e e - w e-e----Q 9 9 9 - 9 w-w e-e r r r - e r-r r-r T T T - r E-E-Q Q r-r----e-Q w - w---w-e r - r---r-e w - w---w-e e---e - Q-Q w - w---w-e r - r---r-e w - w---w-e e---- e