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