a intrat în tunel metroul
a intrat în tunel metroul ?
a WORD_BOUNDARY i n t r a t WORD_BOUNDARY ɨ n WORD_BOUNDARY t u n e l WORD_BOUNDARY m e t r oʊ l WORD_BOUNDARY
a WORD_BOUNDARY i n t r a t WORD_BOUNDARY î n WORD_BOUNDARY t u n e l WORD_BOUNDARY m e t r o u l WORD_BOUNDARY