Nothing Collapsed

R1C1	R1C2	R1C3	R1C4
R2C1		R2C3	R2C4
R3C1	R3C2	R3C3	R3C4
R4C1	R4C2	R4C3	R4C4

Collapse Row2 + Col2

R1C1	R1C2	R1C3	R1C4
R2C1		R2C3	R2C4
R3C1	R3C2	R3C3	R3C4
R4C1	R4C2	R4C3	R4C4