B1800
return B1800;
case B1800:
{ 1800, B1800 },
{ 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
{ 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
case B1800:
#ifdef B1800
{ 1800, B1800, },