nnn nno nnp nns nnt no- non noo nop nor nos not npn npo npp npr nps npt nrn nro nrp nrr nrs nrt nsn nso nsp nsr nss nst ntn nto ntp ntr nts ntt on- onn ono onp onr ons ont oo- oon ooo oop oor oos oot op- opn opo opp opr ops opt or- orn oro orp orr ors ort os- osn oso osp osr oss ost ot- otn oto otp otr ots ott p-p pn- pnn pno pnp pnr pns pnt pon poo pop por pos pot ppn ppo ppp ppr pps ppt prn pro prp prr prs prt ps- psn pso psp psr pss pst pt- ptn pto ptp ptr pts ptt rnn rno rnp rnr rns rnt ron roo rop ror ros rot rpn rpo rpp rpr rps rpt rrn rrp rrr rrs rrt rsn rso rsp rsr rss rst rtn rto rtp rtr rts rtt snn sno snp snr sns snt son soo sop sor sos sot spn spo spp spr sps spt sr- srn sro srp srr srs srt ss- ssn sso ssp ssr sss sst stn sto stp str sts stt tnn tno tnp tnr tns tnt to- ton too top tor tos tot tpn tpo tpp tpr tps tpt trn tro trp trr trs trt tsn tso tsp tsr tss tst ttn tto ttp ttr tts ttt