a-a a-b a-c a-t aaa aab aac aam aao aar aat aau ab- aba abb abc abm abo abr abt abu ac- aca acb acc acm aco acr act acu ama amb amc amm amo amr amt amu aoa aob aoc aom aoo aor aot aou ar- ara arb arc arm aro arr art aru at- ata atb atc atm ato atr att atu au- aua aub auc aum auo aur aut b-u baa bab bac bam bao bar bat bau bba bbb bbc bbm bbo bbr bbt bbu bca bcb bcc bcm bco bcr bct bcu bma bmb bmc bmm bmo bmr bmt bmu boa bob boc bom boo bor bot bou bra brb brm bro brr brt bru bta btb btc btm bto btr btt btu bua bub buc bum buo bur but buu c-- caa cab cac cam cao car cat cau cba cbb cbc cbm cbo cbr cbt cbu cca ccb ccc ccm cco ccr cct ccu cma cmb cmc cmm cmo cmr cmt cmu co- coa cob coc com coo cor cot cou cra crb crc crm cro crr crt cru cta ctb ctc ctm cto ctr ctt ctu cua cub cuc cum cuo cur cut cuu m-o m-r maa mab mac mam mao mar mat mau mba mbb mbc mbm mbo mbr mbt mbu mc- mca mcb mcc mcm mco mcr mct mcu mma mmb mmc mmm mmo mmr mmt mmu moa mob moc mom moo mor mot mou mra mrb mrc mrm mro mrr mrt mru mta mtb mtc mtm mto mtr mtt mtu mua mub muc mum mur mut muu oaa oab oac oam oao oar oat oau ob- oba obb obc obm obo obr obt obu oc- oca ocb occ ocm oco ocr oct ocu om- oma omb omc omm omo omr omt omu oo- ooa oob ooc oom ooo oor oot or- ora orb orc orm oro orr ort oru ot- ota otb otc otm oto otr ott otu ou- oua ouc oum ouo our out ra- raa rab rac ram rao rar rat rau rba rbb rbc rbm rbo rbr rbt rbu rca rcb rcc rcm rco rcr rct rcu rma rmb rmc rmm rmo rmr rmt roa rob roc rom roo ror rot rou rra rrb rrc rrm rrr rrt rru rta rtb rtc rtm rto rtr rtt rtu rua rub ruc rum ruo rur rut ruu taa tab tac tam tao tar tat tau tba tbb tbc tbm tbo tbr tbt tbu tca tcb tcc tcm tco tcr tct tcu tma tmb tmc tmm tmo tmr tmt tmu to- toa tob toc tom too tor tot tou tra trb trc trm tro trr trt tru tta ttb ttc ttm tto ttr ttt ttu tua tub tuc tum tuo tur tut tuu ua- uaa uab uac uam uao uar uat uau uba ubb ubc ubo ubr ubt ubu uca ucb ucc ucm uco ucr uct ucu um- uma umb umc umm umo umr umt umu uoa uob uoc uom uoo uor uot ur- ura urb urc urm uro urr urt uru uta utb utc utm uto utr utt utu uua uuc uum uur uut uuu