was isst er denn
was essen er denn
pro v pro:per adv
was isst er denn ?
v a s WORD_BOUNDARY  ɪ s t WORD_BOUNDARY  ɛ ɐ WORD_BOUNDARY d ɛ n WORD_BOUNDARY
w a s WORD_BOUNDARY i s s t WORD_BOUNDARY e r WORD_BOUNDARY d e n n WORD_BOUNDARY