how how can you be sure
how how can you be sure ?
h aʊ WORD_BOUNDARY h aʊ WORD_BOUNDARY k æ n WORD_BOUNDARY j uː WORD_BOUNDARY b iː WORD_BOUNDARY ʃ ʊ ɹ WORD_BOUNDARY
h o w WORD_BOUNDARY h o w WORD_BOUNDARY c a n WORD_BOUNDARY y o u WORD_BOUNDARY b e WORD_BOUNDARY s u r e WORD_BOUNDARY