ni ada Papi ada Papi ada Mami
ni ada papi ada papi ada mami .
n i WORD_BOUNDARY  a d a WORD_BOUNDARY p a p i WORD_BOUNDARY  a d a WORD_BOUNDARY p a p i WORD_BOUNDARY  a d a WORD_BOUNDARY m a m i WORD_BOUNDARY
n i WORD_BOUNDARY a d a WORD_BOUNDARY p a p i WORD_BOUNDARY a d a WORD_BOUNDARY p a p i WORD_BOUNDARY a d a WORD_BOUNDARY m a m i WORD_BOUNDARY