I have a table which shows a tick in the cells where a combination of both
the column and row headings is valid. I want to extract from this table one
record for each valid combination of by concatenating the column heading and
row heading e.g.

Table looks like this:

A B C
1 x x
2 x
3 x x

Result required:

A1
B2
B3
C1
C3

Can anyone out there help as I am completely stuck as to how to go about this?

Many thanks in anticipation