What kind of info is reported in a PLR for

List, in order, the five elements contained 1) Classification designator 2)SSIC 3) within the text of a Class B message. Subject line 4) Reference line 5) text of message. What does the prosing NNNN mean, and End of Message Function (EOM), after final BT. where is it used? How many separators are used in a Class B 2, BT ................
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