I have a table of 2 columns - file name & PC ID. What I need is list of all 3-letter prefixes - for each PC ID separate. For example:
For:
BUSstop1 PC1
BUSstop3 PC2
TRMstop8 PC1
BIKnet1 PC1
I want to see something like this:
PC1:
BUS
TRM
BIK
PC2:
BUS