bi1 bu3 bi1 bu3 bi1 bu3 bi1 bu3
bi1 bu3 bi1 bu3 bi1 bu3 bi1 bu3
on on on on on on on on
bi1 bu3 bi1 bu3 bi1 bu3 bi1 bu3 .
p i˥ WORD_BOUNDARY p u˧ WORD_BOUNDARY p i˥ WORD_BOUNDARY p u˧ WORD_BOUNDARY p i˥ WORD_BOUNDARY p u˧ WORD_BOUNDARY p i˥ WORD_BOUNDARY p u˧ WORD_BOUNDARY
b i 1 WORD_BOUNDARY b u 3 WORD_BOUNDARY b i 1 WORD_BOUNDARY b u 3 WORD_BOUNDARY b i 1 WORD_BOUNDARY b u 3 WORD_BOUNDARY b i 1 WORD_BOUNDARY b u 3 WORD_BOUNDARY . WORD_BOUNDARY