a a erai erai erai erai
a a erai erai erai erai .
a WORD_BOUNDARY a WORD_BOUNDARY e r a i WORD_BOUNDARY e r a i WORD_BOUNDARY e r a i WORD_BOUNDARY e r a i WORD_BOUNDARY
a WORD_BOUNDARY a WORD_BOUNDARY e r a i WORD_BOUNDARY e r a i WORD_BOUNDARY e r a i WORD_BOUNDARY e r a i WORD_BOUNDARY