nro nrp nrr nrs nrt nsa nsb nsc nse nsh nsi nsn nso nsp nsr nss nst nta ntb ntc nte nth nti ntn nto ntp ntr nts ntt o-i oaa oab oac oae oah oai oan oao oap oar oas oat ob- oba obb obc obe obh obi obn obo obp obr obs obt oc- oca ocb occ och oci ocn oco ocp ocr ocs oct oea oeb oec oee oeh oei oen oeo oep oer oes oet oha ohc ohe ohh ohi ohn oho ohp ohr ohs oht oia oib oic oie oii oin oio oip oir ois oit on- ona onb onc one onh oni onn ono onp onr ons ont oo- ooa oob ooc ooh ooi oon ooo oop oor oos oot op- opa opb opc ope oph opi opn opo opp opr ops opt or- ora orb orc ore orh ori orn oro orp orr ors ort os- osa osb osc ose osh osi osn oso osp osr oss ost ot- ota otb otc ote oth oti otn oto otp otr ots ott p-p paa pab pac pae pah pai pan pao pap par pas pat pba pbb pbc pbe pbi pbn pbo pbp pbr pbs pbt pca pcb pcc pce pch pci pcn pco pcp pcr pcs pct pea peb pec pee peh pei pen peo pep per pes pet pha phb phc phe phi phn pho php phr phs pht pia pib pic pie pih pii pin pio pip pir pis pit pn- pna pnb pnc pne pnh pni pnn pno pnp pnr pns pnt poa pob poc poe poh poi pon poo pop por pos pot ppa ppb ppc ppe pph ppi ppn ppo ppp ppr pps ppt pra prb prc pre prh pri prn pro prp prr prs prt ps- psa psb psc pse psh psi psn pso psp psr pss pst pt- pta ptb ptc pte pth pti ptn pto ptp ptr pts ptt ra- raa rab rac rae rah rai ran rao rap rar ras rat rba rbb rbc rbe rbh rbi rbn rbo rbp rbr rbs rbt rca rcb rcc rce rch rci rcn rco rcp rcr rcs rct re- rea reb rec ree reh rei ren reo rep rer res ret rh- rha rhb rhc rhe rhh rhi rhn rho rhp rhr rhs rht ria rib ric rie rih rii rin rio rip rir ris rit rna rnb rnc rnh rni rnn rno rnp rnr rns rnt roa rob roc roe roh roi ron roo rop ror ros rot rpa rpb rpc rpe rph rpi rpn rpo rpp rpr rps rpt rra rrb rrc rrh rri rrn rrp rrr rrs rrt rsa rsb rsc rse rsh rsi rsn rso rsp rsr rss rst rta rtb rtc rte rti rtn rto rtp rtr rts rtt saa sab sac sae sah sai san sao sap sar sas sat sba sbb sbc sbe sbh sbi sbn sbo sbp sbr sbs sbt sca scb scc sce sch sci scn sco scp scr scs sct se- sea seb sec see seh sei sen seo sep ser ses set sh- sha shb shc she shh shi shn sho shp shr shs sht sia sib sic sie sih sii sin sio sip sir sis sit sna snb snc sne sni snn sno snp snr sns snt soa sob soc soe soh soi son soo sop sor sos sot spa spb spc spe sph spi spn spo spp spr sps spt sr- sra srb src sre srh sri srn sro srp srr srs srt ss- ssa ssb ssc sse ssh ssi ssn sso ssp ssr sss sst sta stb stc ste sth sti stn sto stp str sts stt taa tab tac tae tah tai tan tao tap tar tas tat tba tbb tbc tbe tbh tbi tbn tbo tbp tbr tbs tbt tca tcb tcc tce tch tci tcn tco tcp tcr tcs tct te- tea teb tec tee teh tei ten teo tep ter tes tet th- tha thb thc the thh thi thn tho thp thr ths tht tia tib tic tie tih tii tin tio tip tir tis tit tna tnb tnc tne tnh tni tnn tno tnp tnr tns tnt to- toa tob toc toe toh toi ton too top tor tos tot tpa tpb tpc tpe tph tpi tpn tpo tpp tpr tps tpt tra trb trc tre trh tri trn tro trp trr trs trt tsa tsb tsc tse tsh tsi tsn tso tsp tsr tss tst tta ttb ttc tte tth tti ttn tto ttp ttr tts ttt