singing and humming
sing and hum
part coord part
singing and humming .
s ɪ ŋ ɪ ŋ WORD_BOUNDARY æ n d WORD_BOUNDARY h ʌ m ɪ ŋ WORD_BOUNDARY
s i n g i n g WORD_BOUNDARY a n d WORD_BOUNDARY h u m m i n g WORD_BOUNDARY