 Morpho-Phonological Alterations

"This inventory distinguishes nasal stops /m/ and /n/ from oral stops /b/ and /d/, respectively.../d/ and /b/ occur in complementary distribution with /n/ and /m/, with the oral stops appearing in onsets and the nasals appearing in the codas" (Reilly 2002, 18).Nasalization Processes
X./N-b/ → [m]

Y.