eins zwei drei vier
eins zwei drei vier ?
 aɪ n s WORD_BOUNDARY ts v aɪ WORD_BOUNDARY d ɐ aɪ WORD_BOUNDARY f iː ɐ WORD_BOUNDARY
e i n s WORD_BOUNDARY z w e i WORD_BOUNDARY d r e i WORD_BOUNDARY v i e r WORD_BOUNDARY