-er a-a a-b a-c a-t aaa aab aac aae aag aak aan aap aar aat ab- aba abb abc abe abg abk abn abp abr abt ac- aca acb acc ace acg ack acn acp acr act aea aeb aec aee aeg aek aen aep aer aet ag- aga agb agc age agg agk agn agp agr agt aka akb akc ake akg akk akn akp akr an- ana anb anc ane ang ank ann anp anr ant ap- apa apb apc ape apg apk apn app apr apt ar- ara arb arc are arg ark arn arp arr art at- ata atb atc ate atg atn atp atr att b-p baa bab bac bae bag bak ban bap bar bat bba bbb bbc bbe bbg bbk bbn bbp bbr bbt bca bcb bcc bce bcg bck bcn bcp bcr bct be- bea beb bec bee beg bek ben bep ber bet bga bgb bgc bge bgg bgk bgn bgp bgr bgt bka bkb bkc bke bkg bkk bkn bkp bkr bkt bna bnb bnc bne bng bnk bnn bnp bnr bnt bpa bpb bpc bpe bpg bpn bpp bpr bpt bra brb bre brg brk brn brp brr brt bta btb btc bte btg btk btn btp btr btt c-- caa cab cac cae cag cak can cap car cat cba cbb cbc cbe cbg cbk cbn cbp cbr cbt cca ccb ccc cce ccg cck ccn ccp ccr cct ce- cea ceb cec cee ceg cek cen cep cer cet cga cgb cgc cge cgg cgn cgp cgr cgt cka ckb ckc ckt cn- cna cnb cnc cne cng cnn cnp cnr cnt cpa cpb cpc cpe cpg cpk cpn cpp cpr cpt cra crb crc cre crg crk crn crp crr crt cta ctb ctc cte ctg ctk ctn ctp ctr ctt eaa eab eac eae eag eak ean eap ear eat eba ebb ebc ebe ebg ebk ebn ebp ebr ebt ec- eca ecb ecc ece ecg eck ecn ecr ect eea eeb eec eee eeg eek een eep eer eet ega egb egc ege egg egn egp egr egt eka ekb ekc eke ekg ekp ekr ekt en- ena enb enc ene eng enk enn enp enr ent ep- epa epb epc epe epg epn epp epr ept era erb erc ere erg erk ern erp err ert eta etb etc ete etg etk etn etp etr ett g-p gaa gab gac gae gag gak gan gap gar gat gba gbc gbe gbg gbk gbn gbp gbr gbt gca gcb gcc gce gcg gck gcn gcp gcr gct ge- gea geb gec gee geg gek gen gep ger get gga ggb ggc ggg ggn ggp ggr ggt gka gkb gkn gkp gkt gna gnb gnc gne gnn gnp gnr gnt gpa gpb gpc gpe gpg gpk gpn gpp gpr gpt gra grb grc gre grg grk grn grp grr grt gta gtb gtc gte gtg gtk gtn gtp gtr gtt k-t ka- kaa kab kac kae kag kak kan kap kar kat kba kbb kbc kbe kbk kbn kbp kbr kca kcb kcc kce kcg kck kcn kcp kcr kct ke- kea keb kec kee keg kek ken kep ker ket kga kgb kgc kgp kkb kkc kke kkk kkn kkp kkr kkt kn- kna knc kne kng knk knn knp knr knt kpa kpc kpe kpk kpn kpp kpr kpt kra krc krg krk krn krp krr krt kta ktb ktc kte ktg ktk ktn ktp ktr ktt naa nab nac nae nag nak nan nap nar nat nba nbb nbc nbe nbg nbk nbn nbp nbr nbt nca ncb ncc nce ncg nck ncn ncp ncr nct ne- nea neb nec nee neg nek nen nep ner net nga ngb ngc nge ngg ngk ngn ngp ngt nka nkc nke nkk nkn nkp nkr nkt nna nnb nnc nne nng nnk nnn nnp nnt npa npb npc npe npg npn npp npr npt nra nrb nrc nre nrg nrk nrn nrp nrr nrt nta ntb ntc nte ntg ntk ntn ntp ntr ntt p-p paa pab pac pae pag pak pan pap par pat pba pbb pbc pbe pbg pbk pbn pbp pbr pbt pca pcb pcc pce pcg pck pcn pcp pcr pct pea peb pec pee peg pek pen pep per pet pga pgb pgc pge pgg pgk pgn pgp pgr pgt pka pkb pkc pke pkg pkn pkp pkr pkt pn- pna pnb pnc pne png pnk pnn pnp pnr pnt ppa ppb ppc ppe ppg ppk ppn ppp ppr ppt pra prb prc pre prg prk prn prp prr prt pt- pta ptb ptc pte ptg ptk ptn ptp ptr ptt ra- raa rab rac rae rag rak ran rap rar rat rba rbb rbc rbe rbg rbk rbn rbp rbr rbt rca rcb rcc rce rcg rcn rcp rcr rct re- rea reb rec ree reg rek ren rep rer ret rga rgb rgc rge rgg rgk rgn rgp rgr rgt rkb rkc rke rkg rkk rkp rkt rna rnb rnc rng rnn rnp rnr rnt rpa rpb rpc rpe rpg rpk rpn rpp rpr rpt rra rrb rrc rrg rrk rrn rrp rrr rrt rta rtb rtc rte rtg rtk rtn rtp rtr rtt taa tab tac tae tag tak tan tap tar tat tba tbb tbc tbe tbg tbk tbn tbp tbr tbt tca tcb tcc tce tcg tck tcn tcp tcr tct te- tea teb tec tee teg tek ten tep ter tet tga tgb tgc tge tgg tgk tgn tgp tgr tgt tka tkb tkc tke tkg tkk tkp tkr tkt tna tnb tnc tne tng tnk tnn tnp tnr tnt tpa tpb tpc tpe tpg tpk tpn tpp tpr tpt tra trb trc tre trg trk trn trp trr trt tta ttb ttc tte ttg ttk ttn ttp ttr ttt