that's a tough one
that a tough one
pro:dem det:art adj pro:indef
that's a tough one .
ð æ t s WORD_BOUNDARY ʌ WORD_BOUNDARY t ʌ f WORD_BOUNDARY w ʌ n WORD_BOUNDARY
t h a t ' s WORD_BOUNDARY a WORD_BOUNDARY t o u g h WORD_BOUNDARY o n e WORD_BOUNDARY