-er a-a a-b a-c a-t aaa aab aac aae aam aao aar aat aau ab- aba abb abc abe abm abo abr abt abu ac- aca acb acc ace acm aco acr act acu aea aeb aec aee aem aeo aer aet aeu ama amb amc ame amm amo amr amt amu aoa aob aoc aoe aom aoo aor aot aou ar- ara arb arc are arm aro arr art aru at- ata atb atc ate atm ato atr att atu au- aua aub auc aue aum auo aur aut b-u baa bab bac bae bam bao bar bat bau bba bbb bbc bbe bbm bbo bbr bbt bbu bca bcb bcc bce bcm bco bcr bct bcu be- bea beb bec bee bem beo ber bet beu bma bmb bmc bme bmm bmo bmr bmt bmu boa bob boc boe bom boo bor bot bou bra brb bre brm bro brr brt bru bta btb btc bte btm bto btr btt btu bua bub buc bue bum buo bur but buu c-- caa cab cac cae cam cao car cat cau cba cbb cbc cbe cbm cbo cbr cbt cbu cca ccb ccc cce ccm cco ccr cct ccu ce- cea ceb cec cee cem ceo cer cet ceu cma cmb cmc cme cmm cmo cmr cmt cmu co- coa cob coc coe com coo cor cot cou cra crb crc cre crm cro crr crt cru cta ctb ctc cte ctm cto ctr ctt ctu cua cub cuc cue cum cuo cur cut cuu eaa eab eac eae eam eao ear eat eau eba ebb ebc ebe ebm ebo ebr ebt ebu ec- eca ecb ecc ece ecm eco ecr ect ecu eea eeb eec eee eem eeo eer eet em- ema emb emc eme emm emo emr emt emu eo- eoa eob eoc eoe eom eoo eor eot eou era erb erc ere erm ero err ert eru eta etb etc ete etm eto etr ett etu eu- eua eub euc eue eur eut m-o m-r maa mab mac mae mam mao mar mat mau mba mbb mbc mbe mbm mbo mbr mbt mbu mc- mca mcb mcc mce mcm mco mcr mct mcu mea meb mec mee mem meo mer met meu mma mmb mmc mme mmm mmo mmr mmt mmu moa mob moc moe mom moo mor mot mou mra mrb mrc mre mrm mro mrr mrt mru mta mtb mtc mte mtm mto mtr mtt mtu mua mub muc mue mum mur mut muu oaa oab oac oae oam oao oar oat oau ob- oba obb obc obe obm obo obr obt obu oc- oca ocb occ ocm oco ocr oct ocu oea oeb oec oee oem oeo oer oet om- oma omb omc ome omm omo omr omt omu oo- ooa oob ooc oom ooo oor oot or- ora orb orc ore orm oro orr ort oru ot- ota otb otc ote otm oto otr ott otu ou- oua ouc oue oum ouo our out ra- raa rab rac rae ram rao rar rat rau rba rbb rbc rbe rbm rbo rbr rbt rbu rca rcb rcc rce rcm rco rcr rct rcu re- rea reb rec ree rem reo rer ret reu rma rmb rmc rme rmm rmo rmr rmt roa rob roc roe rom roo ror rot rou rra rrb rrc rrm rrr rrt rru rta rtb rtc rte rtm rto rtr rtt rtu rua rub ruc rue rum ruo rur rut ruu taa tab tac tae tam tao tar tat tau tba tbb tbc tbe tbm tbo tbr tbt tbu tca tcb tcc tce tcm tco tcr tct tcu te- tea teb tec tee tem teo ter tet teu tma tmb tmc tme tmm tmo tmr tmt tmu to- toa tob toc toe tom too tor tot tou tra trb trc tre trm tro trr trt tru tta ttb ttc tte ttm tto ttr ttt ttu tua tub tuc tue tum tuo tur tut tuu ua- uaa uab uac uae uam uao uar uat uau uba ubb ubc ube ubo ubr ubt ubu uca ucb ucc uce ucm uco ucr uct ucu uea ueb uec uee uem uer uet um- uma umb umc ume umm umo umr umt umu uoa uob uoc uoe uom uoo uor uot ur- ura urb urc ure urm uro urr urt uru uta utb utc ute utm uto utr utt utu uua uuc uue uum uur uut uuu