bumm bumm bumm bumm
bumm bumm bumm bumm .
b ʊ m WORD_BOUNDARY b ʊ m WORD_BOUNDARY b ʊ m WORD_BOUNDARY b ʊ m WORD_BOUNDARY
b u m m WORD_BOUNDARY b u m m WORD_BOUNDARY b u m m WORD_BOUNDARY b u m m WORD_BOUNDARY