-up a-a a-b a-c a-t aaa aab aac aao aap aar aas aat aau ab- aba abb abc abo abp abr abs abt abu ac- aca acb acc aco acp acr acs act acu aoa aob aoc aoo aop aor aos aot aou ap- apa apb apc apo app apr aps apt apu ar- ara arb arc aro arp arr ars art aru as- asa asb asc aso asp asr ass ast asu at- ata atb atc ato atp atr ats att atu au- aua aub auc auo aup aur aus aut b-p b-u baa bab bac bao bap bar bas bat bau bba bbb bbc bbo bbp bbr bbs bbt bbu bca bcb bcc bco bcp bcr bcs bct bcu boa bob boc boo bop bor bos bot bou bpa bpb bpc bpo bpp bpr bps bpt bpu bra brb bro brp brr brs brt bru bsa bsb bsc bso bsp bsr bss bst bsu bta btb btc bto btp btr bts btt btu bua bub buc buo bup bur bus but buu c-- caa cab cac cao cap car cas cat cau cba cbb cbc cbo cbp cbr cbs cbt cbu cca ccb ccc cco ccp ccr ccs cct ccu co- coa cob coc coo cop cor cos cot cou cpa cpb cpc cpo cpp cpr cps cpt cpu cra crb crc cro crp crr crs crt cru csa csb csc cso csp csr css cst csu cta ctb ctc cto ctp ctr cts ctt ctu cua cub cuc cuo cup cur cus cut cuu oaa oab oac oao oap oar oas oat oau ob- oba obb obc obo obp obr obs obt obu oc- oca ocb occ oco ocp ocr ocs oct ocu oo- ooa oob ooc ooo oop oor oos oot op- opa opb opc opo opp opr ops opt or- ora orb orc oro orp orr ors ort oru os- osa osb osc oso osp osr oss ost osu ot- ota otb otc oto otp otr ots ott otu ou- oua ouc ouo oup our ous out p-p paa pab pac pao pap par pas pat pau pba pbb pbc pbo pbp pbr pbs pbt pbu pca pcb pcc pco pcp pcr pcs pct pcu poa pob poc poo pop por pos pot pou ppa ppb ppc ppo ppp ppr pps ppt ppu pra prb prc pro prp prr prs prt pru ps- psa psb psc pso psp psr pss pst psu pt- pta ptb ptc pto ptp ptr pts ptt ptu pua pub puc pup pur pus put puu ra- raa rab rac rao rap rar ras rat rau rba rbb rbc rbo rbp rbr rbs rbt rbu rca rcb rcc rco rcp rcr rcs rct rcu roa rob roc roo rop ror ros rot rou rpa rpb rpc rpo rpp rpr rps rpt rpu rra rrb rrc rrp rrr rrs rrt rru rsa rsb rsc rso rsp rsr rss rst rsu rta rtb rtc rto rtp rtr rts rtt rtu rua rub ruc ruo rup rur rus rut ruu saa sab sac sao sap sar sas sat sau sba sbb sbc sbo sbp sbr sbs sbt sbu sca scb scc sco scp scr scs sct scu soa sob soc soo sop sor sos sot sou spa spb spc spo spp spr sps spt spu sr- sra srb src sro srp srr srs srt ss- ssa ssb ssc sso ssp ssr sss sst ssu sta stb stc sto stp str sts stt stu sua sub suc suo sup sur sus sut suu taa tab tac tao tap tar tas tat tau tba tbb tbc tbo tbp tbr tbs tbt tbu tca tcb tcc tco tcp tcr tcs tct tcu to- toa tob toc too top tor tos tot tou tpa tpb tpc tpo tpp tpr tps tpt tpu tra trb trc tro trp trr trs trt tru tsa tsb tsc tso tsp tsr tss tst tsu tta ttb ttc tto ttp ttr tts ttt ttu tua tub tuc tuo tup tur tus tut tuu ua- uaa uab uac uao uap uar uas uat uau uba ubb ubc ubo ubp ubr ubs ubt ubu uca ucb ucc uco ucp ucr ucs uct ucu uoa uob uoc uoo uop uor uos uot up- upa upb upc upo upp upr ups upt upu ur- ura urb urc uro urp urr urs urt uru usa usb usc uso usp usr uss ust usu uta utb utc uto utp utr uts utt utu uua uuc uur uus uut uuu