nrf nri nrl nrn nro nrp nrr nrs nrt nsa nsb nsc nsf nsi nsl nsn nso nsp nsr nss nst nta ntb ntc ntf nti ntn nto ntp ntr nts ntt o-i oaa oab oac oaf oai oal oan oao oap oar oas oat ob- oba obb obc obf obi obl obn obo obp obr obs obt oc- oca ocb occ ocf oci ocl ocn oco ocp ocr ocs oct of- ofa ofb ofc off ofi ofl ofn ofo ofp ofr ofs oft oia oib oic oif oii oil oin oio oip oir ois oit ola olb olc olf oli oll oln olo olp ols olt on- ona onb onc onf oni onl onn ono onp onr ons ont oo- ooa oob ooc oof ooi ool oon ooo oop oor oos oot op- opa opb opc opf opi opl opn opo opp opr ops opt or- ora orb orc orf ori orl orn oro orp orr ors ort os- osa osb osc osf osi osl osn oso osp osr oss ost ot- ota otb otc otf oti otl otn oto otp otr ots ott p-p paa pab pac paf pai pal pan pao pap par pas pat pba pbb pbc pbf pbi pbl pbn pbo pbp pbr pbs pbt pca pcb pcc pcf pci pcl pcn pco pcp pcr pcs pct pfa pfb pfc pff pfi pfl pfn pfo pfp pfr pfs pft pia pib pic pif pii pil pin pio pip pir pis pit pla plb plc plf pli pll pln plo plp plr pls plt pn- pna pnb pnc pnf pni pnl pnn pno pnp pnr pns pnt poa pob poc pof poi pol pon poo pop por pos pot ppa ppb ppc ppf ppi ppl ppn ppo ppp ppr pps ppt pra prb prc prf pri prl prn pro prp prr prs prt ps- psa psb psc psf psi psl psn pso psp psr pss pst pt- pta ptb ptc ptf pti ptl ptn pto ptp ptr pts ptt ra- raa rab rac raf rai ral ran rao rap rar ras rat rba rbb rbc rbf rbi rbl rbn rbo rbp rbr rbs rbt rca rcb rcc rcf rci rcl rcn rco rcp rcr rcs rct rfa rfb rfc rff rfi rfl rfn rfo rfp rfr rfs rft ria rib ric rif rii ril rin rio rip rir ris rit rla rlc rlf rli rll rln rlo rlp rlr rls rlt rna rnb rnc rni rnn rno rnp rnr rns rnt roa rob roc rof roi rol ron roo rop ror ros rot rpa rpb rpc rpf rpi rpl rpn rpo rpp rpr rps rpt rra rrb rrc rrf rri rrl rrn rrp rrr rrs rrt rsa rsb rsc rsf rsi rsl rsn rso rsp rsr rss rst rta rtb rtc rtf rti rtl rtn rto rtp rtr rts rtt saa sab sac saf sai sal san sao sap sar sas sat sba sbb sbc sbf sbi sbl sbn sbo sbp sbr sbs sbt sca scb scc scf sci scl scn sco scp scr scs sct sfa sfb sfc sff sfi sfl sfn sfo sfp sfr sfs sft sia sib sic sif sii sil sin sio sip sir sis sit sla slb slc slf sli sll sln slo slp slr sls slt sna snb snc snf sni snl snn sno snp snr sns snt soa sob soc sof soi sol son soo sop sor sos sot spa spb spc spf spi spl spn spo spp spr sps spt sr- sra srb src srf sri srl srn sro srp srr srs srt ss- ssa ssb ssc ssf ssi ssl ssn sso ssp ssr sss sst sta stb stc stf sti stl stn sto stp str sts stt taa tab tac taf tai tal tan tao tap tar tas tat tba tbb tbc tbf tbi tbl tbn tbo tbp tbr tbs tbt tca tcb tcc tcf tci tcl tcn tco tcp tcr tcs tct tfa tfb tfc tff tfi tfl tfn tfo tfp tfr tfs tft tia tib tic tif tii til tin tio tip tir tis tit tla tlc tlf tli tll tln tlo tlp tlr tls tlt tna tnb tnc tnf tni tnl tnn tno tnp tnr tns tnt to- toa tob toc tof toi tol ton too top tor tos tot tpa tpb tpc tpf tpi tpl tpn tpo tpp tpr tps tpt tra trb trc trf tri trl trn tro trp trr trs trt tsa tsb tsc tsf tsi tsl tsn tso tsp tsr tss tst tta ttb ttc ttf tti ttl ttn tto ttp ttr tts ttt