yaya yaya yaya yaya yaya yaya
yaya yaya yaya yaya yaya yaya .
i a j a WORD_BOUNDARY i a j a WORD_BOUNDARY i a j a WORD_BOUNDARY i a j a WORD_BOUNDARY i a j a WORD_BOUNDARY i a j a WORD_BOUNDARY
y a y a WORD_BOUNDARY y a y a WORD_BOUNDARY y a y a WORD_BOUNDARY y a y a WORD_BOUNDARY y a y a WORD_BOUNDARY y a y a WORD_BOUNDARY . WORD_BOUNDARY