Just to be clear - when you say "ABC format", do you mean:
- Line 1, takes A, B, C
- Line 2, takes A, B, C
- etc
Or
- Take A, lines 1-3
- Take B, lines 1-3
- Take C, lines 1-3
Or
- Something else

How different people denote this has been very all over the map IME, so examples help a lot! 💜