nrp nrr nrs nrt nsa nsc nsd nse nsf nsm nsn nso nsp nsr nss nst nta ntc ntd nte ntf ntm ntn nto ntp ntr nts ntt oaa oac oad oae oaf oam oan oao oap oar oas oat oc- oca occ ocd ocf ocm ocn oco ocp ocr ocs oct oda odc odd ode odf odm odn odo odp odr ods odt oea oec oed oee oef oem oen oeo oep oer oes oet of- ofa ofc ofd ofe off ofm ofn ofo ofp ofr ofs oft om- oma omc omd ome omf omm omn omo omp omr oms omt on- ona onc ond one onf onn ono onp onr ons ont oo- ooa ooc ood oof oom oon ooo oop oor oos oot op- opa opc opd ope opf opm opn opo opp opr ops opt or- ora orc ord ore orf orm orn oro orp orr ors ort os- osa osc osd ose osf osm osn oso osp osr oss ost ot- ota otc otd ote otf otm otn oto otp otr ots ott p-p paa pac pad pae paf pam pan pao pap par pas pat pca pcc pcd pce pcf pcm pcn pco pcp pcr pcs pct pda pdc pdd pde pdf pdm pdn pdo pdp pdr pds pdt pea pec ped pee pef pem pen peo pep per pes pet pfa pfc pfd pfe pff pfm pfn pfo pfp pfr pfs pft pma pmc pmd pme pmf pmm pmn pmo pmp pmr pms pmt pn- pna pnc pnd pne pnf pnm pnn pno pnp pnr pns pnt poa poc pod poe pof pom pon poo pop por pos pot ppa ppc ppd ppe ppf ppm ppn ppo ppp ppr pps ppt pra prc prd pre prf prm prn pro prp prr prs prt ps- psa psc psd pse psf psm psn pso psp psr pss pst pt- pta ptc ptd pte ptf ptm ptn pto ptp ptr pts ptt ra- raa rac rad rae raf ram ran rao rap rar ras rat rca rcc rcd rce rcf rcm rcn rco rcp rcr rcs rct rda rdc rdd rde rdf rdm rdn rdo rdp rdr rds rdt re- rea rec red ree ref rem ren reo rep rer res ret rfa rfc rfd rfe rff rfm rfn rfo rfp rfr rfs rft rma rmc rmd rme rmf rmm rmn rmo rmp rmr rms rmt rna rnc rnd rnm rnn rno rnp rnr rns rnt roa roc rod roe rof rom ron roo rop ror ros rot rpa rpc rpd rpe rpf rpm rpn rpo rpp rpr rps rpt rra rrc rrd rrf rrm rrn rrp rrr rrs rrt rsa rsc rsd rse rsf rsm rsn rso rsp rsr rss rst rta rtc rtd rte rtf rtm rtn rto rtp rtr rts rtt saa sac sad sae saf sam san sao sap sar sas sat sca scc scd sce scf scm scn sco scp scr scs sct sda sdc sdd sde sdf sdm sdn sdo sdp sdr sds sdt se- sea sec sed see sef sem sen seo sep ser ses set sfa sfc sfd sfe sff sfm sfn sfo sfp sfr sfs sft sma smc smd sme smf smm smn smo smp smr sms smt sna snc snd sne snf snm snn sno snp snr sns snt soa soc sod soe sof som son soo sop sor sos sot spa spc spd spe spf spm spn spo spp spr sps spt sr- sra src srd sre srf srm srn sro srp srr srs srt ss- ssa ssc ssd sse ssf ssm ssn sso ssp ssr sss sst sta stc std ste stf stm stn sto stp str sts stt taa tac tad tae taf tam tan tao tap tar tas tat tca tcc tcd tce tcf tcm tcn tco tcp tcr tcs tct tda tdc tdd tde tdf tdm tdn tdo tdp tdr tds tdt te- tea tec ted tee tef tem ten teo tep ter tes tet tfa tfc tfd tfe tff tfm tfn tfo tfp tfr tfs tft tma tmc tmd tme tmf tmm tmn tmo tmp tmr tms tmt tna tnc tnd tne tnf tnm tnn tno tnp tnr tns tnt to- toa toc tod toe tof tom ton too top tor tos tot tpa tpc tpd tpe tpf tpm tpn tpo tpp tpr tps tpt tra trc trd tre trf trm trn tro trp trr trs trt tsa tsc tsd tse tsf tsm tsn tso tsp tsr tss tst tta ttc ttd tte ttf ttm ttn tto ttp ttr tts ttt