There is a possibilty of a group of rows to match that are consecutive, but nothing non-consecutive like 5, 200, etc. For example:
A2 B2 C2 D2 E2 F2 G2
A3 B3 C3 D3 E3 F3 G3
A4 B4 C4 D4 E4 F4 G4
becomes:
A2 B2 C2 D2D3D4 E2 F2 G2
A3 B3 C3 D3 E3 F3 G3
A4 B4 C4 D4 E4 F4 G4