War:
Will it always be "some unknown # of cells with numbers followed by some unknown # of cells that are blank" or will they be interspersed (e.g. 3 cells with numbers, 3 with blanks, 2 with numbers, 1 blank, etc.)?
The latter will be more difficult, but the former should be relatively simple. The isblank(<cell>
and isnumber(<cell>
functions look for blanks and numbers, respectively.