bi1 bu3 bi1 bu3 aa4
bi1 bu3 bi1 bu3 aa4
on on on on fil
bi1 bu3 bi1 bu3 aa4 ?
p i˥ WORD_BOUNDARY p u˧ WORD_BOUNDARY p i˥ WORD_BOUNDARY p u˧ WORD_BOUNDARY a˧˩̰ WORD_BOUNDARY
b i 1 WORD_BOUNDARY b u 3 WORD_BOUNDARY b i 1 WORD_BOUNDARY b u 3 WORD_BOUNDARY a a 4 WORD_BOUNDARY ? WORD_BOUNDARY