koko koko koko koko a
koko koko koko koko a .
k o k o WORD_BOUNDARY k o k o WORD_BOUNDARY k o k o WORD_BOUNDARY k o k o WORD_BOUNDARY a WORD_BOUNDARY
k o k o WORD_BOUNDARY k o k o WORD_BOUNDARY k o k o WORD_BOUNDARY k o k o WORD_BOUNDARY a WORD_BOUNDARY