tercero A tercero B
tercero a tercero b .
t e̞ ɾ s e̞ ɾ o̞ WORD_BOUNDARY a WORD_BOUNDARY t e̞ ɾ s e̞ ɾ o̞ WORD_BOUNDARY β WORD_BOUNDARY
t e r c e r o WORD_BOUNDARY a WORD_BOUNDARY t e r c e r o WORD_BOUNDARY b WORD_BOUNDARY . WORD_BOUNDARY