fliegst du in Urlaub
fliegst du in urlaub ?
f l iː k s t WORD_BOUNDARY d uː WORD_BOUNDARY  ɪ n WORD_BOUNDARY  uː ɐ l aʊ p WORD_BOUNDARY
f l i e g s t WORD_BOUNDARY d u WORD_BOUNDARY i n WORD_BOUNDARY u r l a u b WORD_BOUNDARY