matrix{
ccol{ 3 above {matrix{
ccol{ 2 above 2 above 2 }
}} above 0 }
ccol{ 0 above 3 above 3 }
ccol{ 0 above 0 above {} }
} fwd 0 matrix{
ccol{ 3 above {matrix{
ccol{ 2 above 2 above 2 }
}} above 0 }
ccol{ 0 above 3 above 3 }
ccol{ 0 above 0 above {} }
}