oi oi oi oi zo
oi oi oi oi zo .
 oː i WORD_BOUNDARY  oː i WORD_BOUNDARY  oː i WORD_BOUNDARY  oː i WORD_BOUNDARY z oː WORD_BOUNDARY
o i WORD_BOUNDARY o i WORD_BOUNDARY o i WORD_BOUNDARY o i WORD_BOUNDARY z o WORD_BOUNDARY