a patatas a patatas a pata
a patata a patata a pata
prepart n prepart n prepart n
a patatas a patatas a pata .
a WORD_BOUNDARY p a t a t a s WORD_BOUNDARY a WORD_BOUNDARY p a t a t a s WORD_BOUNDARY a WORD_BOUNDARY p a t a WORD_BOUNDARY
a WORD_BOUNDARY p a t a t a s WORD_BOUNDARY a WORD_BOUNDARY p a t a t a s WORD_BOUNDARY a WORD_BOUNDARY p a t a WORD_BOUNDARY . WORD_BOUNDARY