a-a a-b a-c a-t aaa aab aac aam aao aar aas aat aau ab- aba abb abc abm abo abr abs abt abu ac- aca acb acc acm aco acr acs act acu ama amb amc amm amo amr ams amt amu aoa aob aoc aom aoo aor aos aot aou ar- ara arb arc arm aro arr ars art aru as- asa asb asc asm aso asr ass ast asu at- ata atb atc atm ato atr ats att atu au- aua aub auc aum auo aur aus aut b-u baa bab bac bam bao bar bas bat bau bba bbb bbc bbm bbo bbr bbs bbt bbu bca bcb bcc bcm bco bcr bcs bct bcu bma bmb bmc bmm bmo bmr bms bmt bmu boa bob boc bom boo bor bos bot bou bra brb brm bro brr brs brt bru bsa bsb bsc bsm bso bsr bss bst bsu bta btb btc btm bto btr bts btt btu bua bub buc bum buo bur bus but buu c-- caa cab cac cam cao car cas cat cau cba cbb cbc cbm cbo cbr cbs cbt cbu cca ccb ccc ccm cco ccr ccs cct ccu cma cmb cmc cmm cmo cmr cms cmt cmu co- coa cob coc com coo cor cos cot cou cra crb crc crm cro crr crs crt cru csa csb csc csm cso csr css cst csu cta ctb ctc ctm cto ctr cts ctt ctu cua cub cuc cum cuo cur cus cut cuu m-o m-r maa mab mac mam mao mar mas mat mau mba mbb mbc mbm mbo mbr mbs mbt mbu mc- mca mcb mcc mcm mco mcr mcs mct mcu mma mmb mmc mmm mmo mmr mms mmt mmu moa mob moc mom moo mor mos mot mou mra mrb mrc mrm mro mrr mrs mrt mru msa msb msc msm mso msr mss mst msu mta mtb mtc mtm mto mtr mts mtt mtu mua mub muc mum mur mus mut muu oaa oab oac oam oao oar oas oat oau ob- oba obb obc obm obo obr obs obt obu oc- oca ocb occ ocm oco ocr ocs oct ocu om- oma omb omc omm omo omr oms omt omu oo- ooa oob ooc oom ooo oor oos oot or- ora orb orc orm oro orr ors ort oru os- osa osb osc osm oso osr oss ost osu ot- ota otb otc otm oto otr ots ott otu ou- oua ouc oum ouo our ous out ra- raa rab rac ram rao rar ras rat rau rba rbb rbc rbm rbo rbr rbs rbt rbu rca rcb rcc rcm rco rcr rcs rct rcu rma rmb rmc rmm rmo rmr rms rmt roa rob roc rom roo ror ros rot rou rra rrb rrc rrm rrr rrs rrt rru rsa rsb rsc rsm rso rsr rss rst rsu rta rtb rtc rtm rto rtr rts rtt rtu rua rub ruc rum ruo rur rus rut ruu saa sab sac sam sao sar sas sat sau sba sbb sbc sbm sbo sbr sbs sbt sbu sca scb scc scm sco scr scs sct scu sma smb smc smm smo smr sms smt smu soa sob soc som soo sor sos sot sou sr- sra srb src srm sro srr srs srt ss- ssa ssb ssc ssm sso ssr sss sst ssu sta stb stc stm sto str sts stt stu sua sub suc sum suo sur sus sut suu taa tab tac tam tao tar tas tat tau tba tbb tbc tbm tbo tbr tbs tbt tbu tca tcb tcc tcm tco tcr tcs tct tcu tma tmb tmc tmm tmo tmr tms tmt tmu to- toa tob toc tom too tor tos tot tou tra trb trc trm tro trr trs trt tru tsa tsb tsc tsm tso tsr tss tst tsu tta ttb ttc ttm tto ttr tts ttt ttu tua tub tuc tum tuo tur tus tut tuu ua- uaa uab uac uam uao uar uas uat uau uba ubb ubc ubo ubr ubs ubt ubu uca ucb ucc ucm uco ucr ucs uct ucu um- uma umb umc umm umo umr ums umt umu uoa uob uoc uom uoo uor uos uot ur- ura urb urc urm uro urr urs urt uru usa usb usc usm uso usr uss ust usu uta utb utc utm uto utr uts utt utu uua uuc uum uur uus uut uuu