bucu bucu buc aj
bucu bucu buc aj .
b u t̪s u WORD_BOUNDARY b u t̪s u WORD_BOUNDARY b u t̪s WORD_BOUNDARY a j WORD_BOUNDARY
b u c u WORD_BOUNDARY b u c u WORD_BOUNDARY b u c WORD_BOUNDARY a j WORD_BOUNDARY . WORD_BOUNDARY