sung ngung ngung ngung
sung ngung ngung ngung .
s u ŋ WORD_BOUNDARY ŋ u ŋ WORD_BOUNDARY ŋ u ŋ WORD_BOUNDARY ŋ u ŋ WORD_BOUNDARY
s u n g WORD_BOUNDARY n g u n g WORD_BOUNDARY n g u n g WORD_BOUNDARY n g u n g WORD_BOUNDARY