-up a-a a-b a-c a-t aaa aab aac aad aao aap aar aat aau ab- aba abb abc abd abo abp abr abt abu ac- aca acb acc acd aco acp acr act acu ad- ada adb adc add ado adp adr adt adu aoa aob aoc aod aoo aop aor aot aou ap- apa apb apc apd apo app apr apt apu ar- ara arb arc ard aro arp arr art aru at- ata atb atc atd ato atp atr att atu au- aua aub auc aud auo aup aur aut b-p b-u baa bab bac bad bao bap bar bat bau bba bbb bbc bbd bbo bbp bbr bbt bbu bca bcb bcc bcd bco bcp bcr bct bcu bda bdb bdc bdd bdo bdp bdr bdt bdu boa bob boc bod boo bop bor bot bou bpa bpb bpc bpd bpo bpp bpr bpt bpu bra brb brd bro brp brr brt bru bta btb btc btd bto btp btr btt btu bua bub buc bud buo bup bur but buu c-- caa cab cac cad cao cap car cat cau cba cbb cbc cbd cbo cbp cbr cbt cbu cca ccb ccc ccd cco ccp ccr cct ccu cda cdb cdc cdd cdo cdp cdr cdt cdu co- coa cob coc cod coo cop cor cot cou cpa cpb cpc cpd cpo cpp cpr cpt cpu cra crb crc crd cro crp crr crt cru cta ctb ctc ctd cto ctp ctr ctt ctu cua cub cuc cud cuo cup cur cut cuu daa dab dac dad dao dap dar dat dau dba dbb dbc dbd dbo dbp dbr dbt dbu dca dcb dcc dcd dco dcp dcr dct dcu dda ddb ddc ddd ddo ddp ddr ddt ddu doa dob doc dod doo dop dor dot dou dpa dpb dpc dpd dpo dpp dpr dpt dpu dra drb drc drd dro drp drr drt dru dta dtb dtc dtd dto dtp dtr dtt dtu dua dub duc dud duo dup dur dut oaa oab oac oad oao oap oar oat oau ob- oba obb obc obd obo obp obr obt obu oc- oca ocb occ ocd oco ocp ocr oct ocu oda odb odc odd odo odp odr odt odu oo- ooa oob ooc ood ooo oop oor oot op- opa opb opc opd opo opp opr opt or- ora orb orc ord oro orp orr ort oru ot- ota otb otc otd oto otp otr ott otu ou- oua ouc oud ouo oup our out p-p paa pab pac pad pao pap par pat pau pba pbb pbc pbd pbo pbp pbr pbt pbu pca pcb pcc pcd pco pcp pcr pct pcu pda pdb pdc pdd pdo pdp pdr pdt pdu poa pob poc pod poo pop por pot pou ppa ppb ppc ppd ppo ppp ppr ppt ppu pra prb prc prd pro prp prr prt pru pt- pta ptb ptc ptd pto ptp ptr ptt ptu pua pub puc pud pup pur put puu ra- raa rab rac rad rao rap rar rat rau rba rbb rbc rbd rbo rbp rbr rbt rbu rca rcb rcc rcd rco rcp rcr rct rcu rda rdb rdc rdd rdo rdp rdr rdt rdu roa rob roc rod roo rop ror rot rou rpa rpb rpc rpd rpo rpp rpr rpt rpu rra rrb rrc rrd rrp rrr rrt rru rta rtb rtc rtd rto rtp rtr rtt rtu rua rub ruc rud ruo rup rur rut ruu taa tab tac tad tao tap tar tat tau tba tbb tbc tbd tbo tbp tbr tbt tbu tca tcb tcc tcd tco tcp tcr tct tcu tda tdb tdc tdd tdo tdp tdr tdt tdu to- toa tob toc tod too top tor tot tou tpa tpb tpc tpd tpo tpp tpr tpt tpu tra trb trc trd tro trp trr trt tru tta ttb ttc ttd tto ttp ttr ttt ttu tua tub tuc tud tuo tup tur tut tuu ua- uaa uab uac uad uao uap uar uat uau uba ubb ubc ubo ubp ubr ubt ubu uca ucb ucc ucd uco ucp ucr uct ucu uda udb udc udd udo udp udr udt udu uoa uob uoc uod uoo uop uor uot up- upa upb upc upd upo upp upr upt upu ur- ura urb urc urd uro urp urr urt uru uta utb utc utd uto utp utr utt utu uua uuc uur uut uuu