dung dung dung dung
dung dung dung dung .
d u ŋ WORD_BOUNDARY d u ŋ WORD_BOUNDARY d u ŋ WORD_BOUNDARY d u ŋ WORD_BOUNDARY
d u n g WORD_BOUNDARY d u n g WORD_BOUNDARY d u n g WORD_BOUNDARY d u n g WORD_BOUNDARY