2-way lookup

[Keenan, Greg John (Greg)** CTR **]

Hi,
 
I have a file like:
 
      A       B       C
1    aa11    bb11    cc11
2    aa22    bb22    cc22
3    aa33    bb33    cc33
4    aa44    bb44    cc44
 
I have two sets of coordinates like (A2, C1) and I need to join them
together like aa22cc11
 
I am going to pull the relevent line for the first coordinate into an array
then pull out the relevant element then repeat the steps for the second
coordinate e.g.
 
@lines = <GRIDFILE>;
@line = $lines[3];
$coordData1 = $line[1];
@line = $lines[2];
$coordData2 = $line[3];
...do something with $coordData1 & $coordData2
 
I'm hoping for a better way and I'm looking for suggestions.
 
Thanks for your time.

Greg Keenan 
Lucent Technologies * 
Level 1, 68 Waterloo Road 
North Ryde NSW 2113 
Australia 
* +61 2 9491 6898 
* [EMAIL PROTECTED]