thanks for the advice so far. I monitored 36 of the wikipedia update
channels for an hour and came up with the following tallies:

"" (7053)
MB (4274)
M (1951)
! (1250)
N (436)
!N (406)
B (366)
!M (209)
!MB (154)
NB (95)
NM (67)
!NM (23)
NMB (3)
!B (2)

So it looks like the N, M and B can be combined?  does anyone know
what the ! means?

//Ed

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