nnn nno nnp nns nnt no- non noo nop nor nos not nox npn npo npp npr nps npt nrn nro nrp nrr nrs nrt nrx nsn nso nsp nsr nss nst nsx ntn nto ntp ntr nts ntt ntx nxt on- onn ono onp onr ons ont onx oo- oon ooo oop oor oos oot oox op- opn opo opp opr ops opt opx or- orn oro orp orr ors ort orx os- osn oso osp osr oss ost osx ot- otn oto otp otr ots ott ox- oxn oxo oxt oxx p-p pn- pnn pno pnp pnr pns pnt pnx pon poo pop por pos pot pox ppn ppo ppp ppr pps ppt ppx prn pro prp prr prs prt prx ps- psn pso psp psr pss pst psx pt- ptn pto ptp ptr pts ptt ptx pxr pxs pxt rnn rno rnp rnr rns rnt ron roo rop ror ros rot rox rpn rpo rpp rpr rps rpt rpx rrn rrp rrr rrs rrt rsn rso rsp rsr rss rst rsx rtn rto rtp rtr rts rtt rtx rxp rxr rxs snn sno snp snr sns snt son soo sop sor sos sot sox spn spo spp spr sps spt spx sr- srn sro srp srr srs srt srx ss- ssn sso ssp ssr sss sst ssx stn sto stp str sts stt stx sxn sxs sxt t-x tnn tno tnp tnr tns tnt tnx to- ton too top tor tos tot tox tpn tpo tpp tpr tps tpt tpx trn tro trp trr trs trt trx tsn tso tsp tsr tss tst tsx ttn tto ttp ttr tts ttt ttx txn txs txt xno xns xon xoo xop xor xos xot xox xpn xpo xpp xps xpt xrt xrx xsp xss xst xtp xtr xts xtx xxo xxp xxx