Here are some loan-words written with the nasalized dipthong    un\ /  um\ / uM [oun].

READING

You will read this word puM`pc\ as [poun pjin] when you are reading as it is written, but it is sometimes read or said [poun bjin] and sometimes [poun mjin].  Notice that the consonant [p] that follows the nasalized dipthong changes to the nasalized consonant [m].  Nasalization of the consonant following after a nasalized vowel usually occurs when a speaker says a word fast. 

WRITTEN		READ
Bun\;@kI;	[bòun cì]	[phòun jì]
		[phòun njì]
Aun\;pc\	[òun pin]	[òun bin]
		[òun min]
puMeta\	[poun taw ]	[poun daw]
		[poun naw]