papa p p po p p po p p pa p p popa p p popa p p
papa p p po p p po p p pa p p popa p p popa p p .
p a p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY
p a p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY p o p a WORD_BOUNDARY p WORD_BOUNDARY p WORD_BOUNDARY . WORD_BOUNDARY