hi, can anyone help me with a problem that has me stumped?
i am trying to calculate the number of times a different combination of 2 cells appears across a range of cells - please see sample below:

A B C D E F G H I J K L
E E E E F F F F E E F F

So for the combination of the value in Cell A+B - I need to count the number of different values across A+B and E+F and I+J - so in this case it would be 2, as we ignore cells C,D,G,H,K,L etc.

Does this make sense? The cells are basically languages that I am trying to calculate the amount of localisation and translation work required - so the values per cell can have up to 18 differing combinations per cell.

Thanks

James