in wessen Büro bin ich
in wessen Büro sein ich
prep pro:int n cop pro:per
in wessen büro bin ich ?
 ɪ n WORD_BOUNDARY v ɛ s ə n WORD_BOUNDARY b yː ʀ oː WORD_BOUNDARY b ɪ n WORD_BOUNDARY  ɪ ç WORD_BOUNDARY
i n WORD_BOUNDARY w e s s e n WORD_BOUNDARY b ü r o WORD_BOUNDARY b i n WORD_BOUNDARY i c h WORD_BOUNDARY