Van. [mm], [nn] became [mb], [nd]; [mm|nn] > [mb|nd]

Van. [mm], [nn] became [mb], [nd]; [mm|nn] > [mb|nd]

Reference ✧ PE19/92

Phonetic Rule Elements

[mm]	>	[mb]	✧ PE19/92 (mm > mb)
[nn]	>	[nd]	✧ PE19/92 (nn > nd)