nnn nnp nns npn npp npr nps nrn nrp nrr nrs nry nsn nsp nsr nss nsy nyn nyp nys nyy p-p pn- pnn pnp pnr pns pny ppn ppp ppr pps prn prp prr prs pry ps- psn psp psr pss psy py- pyn pyr pys rnn rnp rnr rns rny rpn rpp rpr rps rrn rrp rrr rrs rsn rsp rsr rss ry- ryn ryr rys ryy snn snp snr sns sny spn spp spr sps spy sr- srn srp srr srs sry ss- ssn ssp ssr sss sy- syn syp syr sys ynn ynp yns yny yps yrn yrp yrs ysp ysr yss ysy yys yyy