ball 定 balloon aa3
ball ding6 balloon aa3
L2 adj L2 fil
ball 定 balloon aa3 ?
 WORD_BOUNDARY t ɛ˨ ŋ WORD_BOUNDARY  WORD_BOUNDARY a˧ WORD_BOUNDARY
b a l l WORD_BOUNDARY 定 WORD_BOUNDARY b a l l o o n WORD_BOUNDARY a a 3 WORD_BOUNDARY ? WORD_BOUNDARY