unter 'm Bo unter 'm Bett
unter 'm bo unter 'm bett .
 ʊ n t ɐ WORD_BOUNDARY  ɛ m WORD_BOUNDARY b oː WORD_BOUNDARY  ʊ n t ɐ WORD_BOUNDARY  ɛ m WORD_BOUNDARY b ɛ t WORD_BOUNDARY
u n t e r WORD_BOUNDARY ' m WORD_BOUNDARY b o WORD_BOUNDARY u n t e r WORD_BOUNDARY ' m WORD_BOUNDARY b e t t WORD_BOUNDARY