mtsch mtsch mtsch
mtsch mtsch mtsch .
 ɛ m t eː ɛ s ts eː h ɑː WORD_BOUNDARY  ɛ m t eː ɛ s ts eː h ɑː WORD_BOUNDARY  ɛ m t eː ɛ s ts eː h ɑː WORD_BOUNDARY
m t s c h WORD_BOUNDARY m t s c h WORD_BOUNDARY m t s c h WORD_BOUNDARY