-er a-a a-b a-c a-t aaa aab aac aad aae aaf aan aao aar aat aau ab- aba abb abc abd abe abf abn abo abr abt abu ac- aca acb acc acd ace acf acn aco acr act acu ad- ada adb adc add ade adf adn ado adr adt adu aea aeb aec aed aee aef aen aeo aer aet aeu af- afa afb afc afd afe aff afn afo afr aft afu an- ana anb anc and ane anf ann ano anr ant anu aoa aob aoc aod aoe aof aon aoo aor aot aou ar- ara arb arc ard are arf arn aro arr art aru at- ata atb atc atd ate atf atn ato atr att atu au- aua aub auc aud aue auf aun auo aur aut b-u baa bab bac bad bae baf ban bao bar bat bau bba bbb bbc bbd bbe bbf bbn bbo bbr bbt bbu bca bcb bcc bcd bce bcf bcn bco bcr bct bcu bda bdb bdc bdd bde bdf bdo bdr bdt bdu be- bea beb bec bed bee bef ben beo ber bet beu bfa bfb bfc bfd bfe bff bfn bfo bfr bft bfu bna bnb bnc bnd bne bnf bnn bno bnr bnt bnu boa bob boc bod boe bof bon boo bor bot bou bra brb brd bre brf brn bro brr brt bru bta btb btc btd bte btf btn bto btr btt btu bua bub buc bud bue buf bun buo bur but buu c-- caa cab cac cad cae caf can cao car cat cau cba cbb cbc cbd cbe cbf cbn cbo cbr cbt cbu cca ccb ccc ccd cce ccf ccn cco ccr cct ccu cda cdb cdc cdd cde cdf cdn cdo cdr cdt cdu ce- cea ceb cec ced cee cef cen ceo cer cet ceu cfa cfb cfc cfd cfe cff cfn cfo cfr cft cfu cn- cna cnb cnc cnd cne cnf cnn cno cnr cnt cnu co- coa cob coc cod coe cof con coo cor cot cou cra crb crc crd cre crf crn cro crr crt cru cta ctb ctc ctd cte ctf ctn cto ctr ctt ctu cua cub cuc cud cue cuf cun cuo cur cut cuu daa dab dac dad dae daf dan dao dar dat dau dba dbb dbc dbd dbe dbf dbn dbo dbr dbt dbu dca dcb dcc dcd dce dcf dcn dco dcr dct dcu dda ddb ddc ddd dde ddf ddn ddo ddr ddt ddu de- dea deb dec ded dee def den deo der det deu dfa dfb dfc dfd dfe dff dfn dfo dfr dft dfu dna dnb dnc dnd dne dnf dnn dno dnr dnt doa dob doc dod doe dof don doo dor dot dou dra drb drc drd dre drn dro drr drt dru dta dtb dtc dtd dte dtf dtn dto dtr dtt dtu dua dub duc dud due duf dun duo dur dut eaa eab eac ead eae eaf ean eao ear eat eau eba ebb ebc ebd ebe ebf ebn ebo ebr ebt ebu ec- eca ecb ecc ecd ece ecf ecn eco ecr ect ecu ed- eda edb edc edd ede edf edn edo edr edt edu eea eeb eec eed eee eef een eeo eer eet ef- efa efb efc efd efe eff efo efr eft en- ena enb enc end ene enf enn eno enr ent enu eo- eoa eob eoc eod eoe eof eon eoo eor eot eou era erb erc erd ere erf ern ero err ert eru eta etb etc etd ete etf etn eto etr ett etu eu- eua eub euc eud eue euf eun eur eut faa fab fac fad fae faf fan fao far fat fau fba fbb fbc fbd fbe fbf fbn fbo fbr fbt fbu fca fcb fcc fcd fce fcf fcn fco fcr fct fcu fda fdb fdc fdd fde fdf fdn fdo fdr fdt fdu fea feb fec fed fee fef fen feo fer fet feu ffa ffc ffd ffe fff ffn ffo ffr fft ffu fna fnb fnc fnd fne fnf fnn fnr fnt fnu foa fob foc foe fof fon foo for fot fou fra frb frc frd fre frf frn fro frr frt fru fta ftb ftc ftd fte ftf ftn fto ftr ftt ftu fua fub fud fue fuf fun fuo fur fut fuu naa nab nac nad nae naf nan nao nar nat nau nba nbb nbc nbd nbe nbf nbn nbo nbr nbt nbu nca ncb ncc ncd nce ncf ncn nco ncr nct ncu nda ndb ndc ndd nde ndf ndn ndo ndr ndt ndu ne- nea neb nec ned nee nef nen neo ner net neu nfa nfb nfc nfd nfe nff nfn nfo nfr nft nfu nna nnb nnc nne nnf nnn nno nnt nnu no- noa nob noc nod noe nof non noo nor not nou nra nrb nrc nrd nre nrf nrn nro nrr nrt nru nta ntb ntc ntd nte ntf ntn nto ntr ntt ntu nua nub nuc nud nue nun nuo nur nut nuu oaa oab oac oad oae oaf oan oao oar oat oau ob- oba obb obc obd obe obf obn obo obr obt obu oc- oca ocb occ ocd ocf ocn oco ocr oct ocu oda odb odc odd ode odf odn odo odr odt odu oea oeb oec oed oee oef oen oeo oer oet of- ofa ofb ofc ofd ofe off ofn ofo ofr oft ofu on- ona onb onc ond one onf onn ono onr ont onu oo- ooa oob ooc ood oof oon ooo oor oot or- ora orb orc ord ore orf orn oro orr ort oru ot- ota otb otc otd ote otf otn oto otr ott otu ou- oua ouc oud oue ouf oun ouo our out ra- raa rab rac rad rae raf ran rao rar rat rau rba rbb rbc rbd rbe rbf rbn rbo