ce s+a întîmplat
ce s a întîmplat ?
t̠ʃ e WORD_BOUNDARY s e WORD_BOUNDARY a WORD_BOUNDARY ɨ n t ɨ m p l a t WORD_BOUNDARY
c e WORD_BOUNDARY s WORD_BOUNDARY a WORD_BOUNDARY î n t î m p l a t WORD_BOUNDARY