a ma a hm hm a aha ah
a ma a hm hm a aha ah .
a WORD_BOUNDARY m a WORD_BOUNDARY a WORD_BOUNDARY x m WORD_BOUNDARY x m WORD_BOUNDARY a WORD_BOUNDARY a x a WORD_BOUNDARY a x WORD_BOUNDARY
a WORD_BOUNDARY m a WORD_BOUNDARY a WORD_BOUNDARY h m WORD_BOUNDARY h m WORD_BOUNDARY a WORD_BOUNDARY a h a WORD_BOUNDARY a h WORD_BOUNDARY . WORD_BOUNDARY