ROW ROW0
CELL 0 3 3 CELL0.0.2.1
CELL 1 1 1 CELL0.1.1.1
#CELL 2 1 1 EMPTY
ROW ROW1
CELL 1 1 2 CELL1.1.1.2
ROW ROW2
CELL 0 1 1 REMOVED
CELL 0 1 2 CELL2.0.1.2
CELL -1 1 1 CELL2.2.1.1