zitten er brieven in
zitten er brieven in ?
z ɪ t ə n WORD_BOUNDARY  ə r WORD_BOUNDARY b r i v ə n WORD_BOUNDARY  ɪ n WORD_BOUNDARY
z i t t e n WORD_BOUNDARY e r WORD_BOUNDARY b r i e v e n WORD_BOUNDARY i n WORD_BOUNDARY