A cuarto grado A
a cuarto grado a .
a WORD_BOUNDARY k w a ɾ t o̞ WORD_BOUNDARY ɡ ɾ a d o̞ WORD_BOUNDARY a WORD_BOUNDARY
a WORD_BOUNDARY c u a r t o WORD_BOUNDARY g r a d o WORD_BOUNDARY a WORD_BOUNDARY . WORD_BOUNDARY