-er a-a a-b a-t aaa aab aae aag aak aan aap aar aat ab- aba abb abe abg abk abn abp abr abt aea aeb aee aeg aek aen aep aer aet ag- aga agb age agg agk agn agp agr agt aka akb ake akg akk akn akp akr an- ana anb ane ang ank ann anp anr ant ap- apa apb ape apg apk apn app apr apt ar- ara arb are arg ark arn arp arr art at- ata atb ate atg atn atp atr att b-p baa bab bae bag bak ban bap bar bat bba bbb bbe bbg bbk bbn bbp bbr bbt be- bea beb bee beg bek ben bep ber bet bga bgb bge bgg bgk bgn bgp bgr bgt bka bkb bke bkg bkk bkn bkp bkr bkt bna bnb bne bng bnk bnn bnp bnr bnt bpa bpb bpe bpg bpn bpp bpr bpt bra brb bre brg brk brn brp brr brt bta btb bte btg btk btn btp btr btt eaa eab eae eag eak ean eap ear eat eba ebb ebe ebg ebk ebn ebp ebr ebt eea eeb eee eeg eek een eep eer eet ega egb ege egg egn egp egr egt eka ekb eke ekg ekp ekr ekt en- ena enb ene eng enk enn enp enr ent ep- epa epb epe epg epn epp epr ept era erb ere erg erk ern erp err ert eta etb ete etg etk etn etp etr ett g-p gaa gab gae gag gak gan gap gar gat gba gbe gbg gbk gbn gbp gbr gbt ge- gea geb gee geg gek gen gep ger get gga ggb ggg ggn ggp ggr ggt gka gkb gkn gkp gkt gna gnb gne gnn gnp gnr gnt gpa gpb gpe gpg gpk gpn gpp gpr gpt gra grb gre grg grk grn grp grr grt gta gtb gte gtg gtk gtn gtp gtr gtt k-t ka- kaa kab kae kag kak kan kap kar kat kba kbb kbe kbk kbn kbp kbr ke- kea keb kee keg kek ken kep ker ket kga kgb kgp kkb kke kkk kkn kkp kkr kkt kn- kna kne kng knk knn knp knr knt kpa kpe kpk kpn kpp kpr kpt kra krg krk krn krp krr krt kta ktb kte ktg ktk ktn ktp ktr ktt naa nab nae nag nak nan nap nar nat nba nbb nbe nbg nbk nbn nbp nbr nbt ne- nea neb nee neg nek nen nep ner net nga ngb nge ngg ngk ngn ngp ngt nka nke nkk nkn nkp nkr nkt nna nnb nne nng nnk nnn nnp nnt npa npb npe npg npn npp npr npt nra nrb nre nrg nrk nrn nrp nrr nrt nta ntb nte ntg ntk ntn ntp ntr ntt p-p paa pab pae pag pak pan pap par pat pba pbb pbe pbg pbk pbn pbp pbr pbt pea peb pee peg pek pen pep per pet pga pgb pge pgg pgk pgn pgp pgr pgt pka pkb pke pkg pkn pkp pkr pkt pn- pna pnb pne png pnk pnn pnp pnr pnt ppa ppb ppe ppg ppk ppn ppp ppr ppt pra prb pre prg prk prn prp prr prt pt- pta ptb pte ptg ptk ptn ptp ptr ptt ra- raa rab rae rag rak ran rap rar rat rba rbb rbe rbg rbk rbn rbp rbr rbt re- rea reb ree reg rek ren rep rer ret rga rgb rge rgg rgk rgn rgp rgr rgt rkb rke rkg rkk rkp rkt rna rnb rng rnn rnp rnr rnt rpa rpb rpe rpg rpk rpn rpp rpr rpt rra rrb rrg rrk rrn rrp rrr rrt rta rtb rte rtg rtk rtn rtp rtr rtt taa tab tae tag tak tan tap tar tat tba tbb tbe tbg tbk tbn tbp tbr tbt te- tea teb tee teg tek ten tep ter tet tga tgb tge tgg tgk tgn tgp tgr tgt tka tkb tke tkg tkk tkp tkr tkt tna tnb tne tng tnk tnn tnp tnr tnt tpa tpb tpe tpg tpk tpn tpp tpr tpt tra trb tre trg trk trn trp trr trt tta ttb tte ttg ttk ttn ttp ttr ttt