a-a a-b a-c a-t aaa aab aac aae aam aao aas aat aau ab- aba abb abc abe abm abo abs abt abu ac- aca acb acc ace acm aco acs act acu aea aeb aec aee aem aeo aes aet aeu ama amb amc ame amm amo ams amt amu aoa aob aoc aoe aom aoo aos aot aou as- asa asb asc ase asm aso ass ast asu at- ata atb atc ate atm ato ats att atu au- aua aub auc aue aum auo aus aut b-u baa bab bac bae bam bao bas bat bau bba bbb bbc bbe bbm bbo bbs bbt bbu bca bcb bcc bce bcm bco bcs bct bcu be- bea beb bec bee bem beo bes bet beu bma bmb bmc bme bmm bmo bms bmt bmu boa bob boc boe bom boo bos bot bou bsa bsb bsc bse bsm bso bss bst bsu bta btb btc bte btm bto bts btt btu bua bub buc bue bum buo bus but buu c-- caa cab cac cae cam cao cas cat cau cba cbb cbc cbe cbm cbo cbs cbt cbu cca ccb ccc cce ccm cco ccs cct ccu ce- cea ceb cec cee cem ceo ces cet ceu cma cmb cmc cme cmm cmo cms cmt cmu co- coa cob coc coe com coo cos cot cou csa csb csc cse csm cso css cst csu cta ctb ctc cte ctm cto cts ctt ctu cua cub cuc cue cum cuo cus cut cuu eaa eab eac eae eam eao eas eat eau eba ebb ebc ebe ebm ebo ebs ebt ebu ec- eca ecb ecc ece ecm eco ecs ect ecu eea eeb eec eee eem eeo ees eet em- ema emb emc eme emm emo ems emt emu eo- eoa eob eoc eoe eom eoo eos eot eou es- esa esb esc ese esm eso ess est esu eta etb etc ete etm eto ets ett etu eu- eua eub euc eue eus eut m-o maa mab mac mae mam mao mas mat mau mba mbb mbc mbe mbm mbo mbs mbt mbu mc- mca mcb mcc mce mcm mco mcs mct mcu mea meb mec mee mem meo mes met meu mma mmb mmc mme mmm mmo mms mmt mmu moa mob moc moe mom moo mos mot mou msa msb msc mse msm mso mss mst msu mta mtb mtc mte mtm mto mts mtt mtu mua mub muc mue mum mus mut muu oaa oab oac oae oam oao oas oat oau ob- oba obb obc obe obm obo obs obt obu oc- oca ocb occ ocm oco ocs oct ocu oea oeb oec oee oem oeo oes oet om- oma omb omc ome omm omo oms omt omu oo- ooa oob ooc oom ooo oos oot os- osa osb osc ose osm oso oss ost osu ot- ota otb otc ote otm oto ots ott otu ou- oua ouc oue oum ouo ous out saa sab sac sae sam sao sas sat sau sba sbb sbc sbe sbm sbo sbs sbt sbu sca scb scc sce scm sco scs sct scu se- sea seb sec see sem seo ses set seu sma smb smc sme smm smo sms smt smu soa sob soc soe som soo sos sot sou ss- ssa ssb ssc sse ssm sso sss sst ssu sta stb stc ste stm sto sts stt stu sua sub suc sue sum suo sus sut suu taa tab tac tae tam tao tas tat tau tba tbb tbc tbe tbm tbo tbs tbt tbu tca tcb tcc tce tcm tco tcs tct tcu te- tea teb tec tee tem teo tes tet teu tma tmb tmc tme tmm tmo tms tmt tmu to- toa tob toc toe tom too tos tot tou tsa tsb tsc tse tsm tso tss tst tsu tta ttb ttc tte ttm tto tts ttt ttu tua tub tuc tue tum tuo tus tut tuu ua- uaa uab uac uae uam uao uas uat uau uba ubb ubc ube ubo ubs ubt ubu uca ucb ucc uce ucm uco ucs uct ucu uea ueb uec uee uem ues uet um- uma umb umc ume umm umo ums umt umu uoa uob uoc uoe uom uoo uos uot usa usb usc use usm uso uss ust usu uta utb utc ute utm uto uts utt utu uua uuc uue uum uus uut uuu