questo era un tubo
questo esse uno tubo
det v art n
questo era un tubo .
k w e s t o WORD_BOUNDARY ɛ r ɐ WORD_BOUNDARY o n WORD_BOUNDARY t u b o WORD_BOUNDARY
q u e s t o WORD_BOUNDARY e r a WORD_BOUNDARY u n WORD_BOUNDARY t u b o WORD_BOUNDARY . WORD_BOUNDARY