a tutti o a una sola
a tutti o a una sola ?
a WORD_BOUNDARY t u tː ɪ WORD_BOUNDARY o WORD_BOUNDARY a WORD_BOUNDARY ʊ n a WORD_BOUNDARY s o l a WORD_BOUNDARY
a WORD_BOUNDARY t u t t i WORD_BOUNDARY o WORD_BOUNDARY a WORD_BOUNDARY u n a WORD_BOUNDARY s o l a WORD_BOUNDARY