I have a column with 10000 entries. I want to highlight duplicate cells that
have the exact same text string order.
I would have the following:

Cap
Fernco Cap
Coupling
Coupling
Fernco Coupling
Fernco Coupling
Fernco Coupling
Fernco Coupling
Fernco Coupling
Where as the 1st 2 lines are not matching but the remaining would be
duplicates. I would like to highlight not delete these cells. Or find the 1st
one and cross-out the remaining.