Silly sort question.
I have a set of data that has a Line Number (LN). The sequence is 1 to 999. BUT, I need to insert new lines without conflicting with the existing LN assignment. There's only one problem the new lines will have a letter A-Z attached to it (thought A-D is most likely the extent in the real world data). The new lines come in from a different data flow. This applies to multiple accounts, where each account has a 1-N different number of original LNs
| ORIGINAL LNs | WITH NEW LINES |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 3A |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| | 7A |
| | 7B |
| | 7C |
| | 8 |
| | |
