a-a a-b a-c a-t aaa aab aac aae aam aas aat aau ab- aba abb abc abe abm abs abt abu ac- aca acb acc ace acm acs act acu aea aeb aec aee aem aes aet aeu ama amb amc ame amm ams amt amu as- asa asb asc ase asm ass ast asu at- ata atb atc ate atm ats att atu au- aua aub auc aue aum aus aut b-u baa bab bac bae bam bas bat bau bba bbb bbc bbe bbm bbs bbt bbu bca bcb bcc bce bcm bcs bct bcu be- bea beb bec bee bem bes bet beu bma bmb bmc bme bmm bms bmt bmu bsa bsb bsc bse bsm bss bst bsu bta btb btc bte btm bts btt btu bua bub buc bue bum bus but buu c-- caa cab cac cae cam cas cat cau cba cbb cbc cbe cbm cbs cbt cbu cca ccb ccc cce ccm ccs cct ccu ce- cea ceb cec cee cem ces cet ceu cma cmb cmc cme cmm cms cmt cmu csa csb csc cse csm css cst csu cta ctb ctc cte ctm cts ctt ctu cua cub cuc cue cum cus cut cuu eaa eab eac eae eam eas eat eau eba ebb ebc ebe ebm ebs ebt ebu ec- eca ecb ecc ece ecm ecs ect ecu eea eeb eec eee eem ees eet em- ema emb emc eme emm ems emt emu es- esa esb esc ese esm ess est esu eta etb etc ete etm ets ett etu eu- eua eub euc eue eus eut maa mab mac mae mam mas mat mau mba mbb mbc mbe mbm mbs mbt mbu mc- mca mcb mcc mce mcm mcs mct mcu mea meb mec mee mem mes met meu mma mmb mmc mme mmm mms mmt mmu msa msb msc mse msm mss mst msu mta mtb mtc mte mtm mts mtt mtu mua mub muc mue mum mus mut muu saa sab sac sae sam sas sat sau sba sbb sbc sbe sbm sbs sbt sbu sca scb scc sce scm scs sct scu se- sea seb sec see sem ses set seu sma smb smc sme smm sms smt smu ss- ssa ssb ssc sse ssm sss sst ssu sta stb stc ste stm sts stt stu sua sub suc sue sum sus sut suu taa tab tac tae tam tas tat tau tba tbb tbc tbe tbm tbs tbt tbu tca tcb tcc tce tcm tcs tct tcu te- tea teb tec tee tem tes tet teu tma tmb tmc tme tmm tms tmt tmu tsa tsb tsc tse tsm tss tst tsu tta ttb ttc tte ttm tts ttt ttu tua tub tuc tue tum tus tut tuu ua- uaa uab uac uae uam uas uat uau uba ubb ubc ube ubs ubt ubu uca ucb ucc uce ucm ucs uct ucu uea ueb uec uee uem ues uet um- uma umb umc ume umm ums umt umu usa usb usc use usm uss ust usu uta utb utc ute utm uts utt utu uua uuc uue uum uus uut uuu