stack stack them up
stack them up
v pro:obj adv
stack stack them up ?
s t æ k WORD_BOUNDARY s t æ k WORD_BOUNDARY ð ɛ m WORD_BOUNDARY ʌ p WORD_BOUNDARY
s t a c k WORD_BOUNDARY s t a c k WORD_BOUNDARY t h e m WORD_BOUNDARY u p WORD_BOUNDARY