pi pipo pipo pipo pipo pipopipo
pi pipo pipo pipo pipo pipopipo .
p i WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o p i p o WORD_BOUNDARY
p i WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o WORD_BOUNDARY p i p o p i p o WORD_BOUNDARY