LATCC was A (2pm - 8pm); M (8am - 2pm) then back in at 8pm that same day for a 12 hour night shift usually split into first half, second half or long sleep; rest of that 3rd day was sleep, followed by day off, then repeat.
You forgot to mention the sector 8s Which for those of you non LATCC meant you didn't come in at all. Which made the 4 watch system much more bearable