-up a-a a-b a-c aaa aab aac aad aao aap aar aau ab- aba abb abc abd abo abp abr abu ac- aca acb acc acd aco acp acr acu ad- ada adb adc add ado adp adr adu aoa aob aoc aod aoo aop aor aou ap- apa apb apc apd apo app apr apu ar- ara arb arc ard aro arp arr aru au- aua aub auc aud auo aup aur b-p b-u baa bab bac bad bao bap bar bau bba bbb bbc bbd bbo bbp bbr bbu bca bcb bcc bcd bco bcp bcr bcu bda bdb bdc bdd bdo bdp bdr bdu boa bob boc bod boo bop bor bou bpa bpb bpc bpd bpo bpp bpr bpu bra brb brd bro brp brr bru bua bub buc bud buo bup bur buu c-- caa cab cac cad cao cap car cau cba cbb cbc cbd cbo cbp cbr cbu cca ccb ccc ccd cco ccp ccr ccu cda cdb cdc cdd cdo cdp cdr cdu co- coa cob coc cod coo cop cor cou cpa cpb cpc cpd cpo cpp cpr cpu cra crb crc crd cro crp crr cru cua cub cuc cud cuo cup cur cuu daa dab dac dad dao dap dar dau dba dbb dbc dbd dbo dbp dbr dbu dca dcb dcc dcd dco dcp dcr dcu dda ddb ddc ddd ddo ddp ddr ddu doa dob doc dod doo dop dor dou dpa dpb dpc dpd dpo dpp dpr dpu dra drb drc drd dro drp drr dru dua dub duc dud duo dup dur oaa oab oac oad oao oap oar oau ob- oba obb obc obd obo obp obr obu oc- oca ocb occ ocd oco ocp ocr ocu oda odb odc odd odo odp odr odu oo- ooa oob ooc ood ooo oop oor op- opa opb opc opd opo opp opr or- ora orb orc ord oro orp orr oru ou- oua ouc oud ouo oup our p-p paa pab pac pad pao pap par pau pba pbb pbc pbd pbo pbp pbr pbu pca pcb pcc pcd pco pcp pcr pcu pda pdb pdc pdd pdo pdp pdr pdu poa pob poc pod poo pop por pou ppa ppb ppc ppd ppo ppp ppr ppu pra prb prc prd pro prp prr pru pua pub puc pud pup pur puu ra- raa rab rac rad rao rap rar rau rba rbb rbc rbd rbo rbp rbr rbu rca rcb rcc rcd rco rcp rcr rcu rda rdb rdc rdd rdo rdp rdr rdu roa rob roc rod roo rop ror rou rpa rpb rpc rpd rpo rpp rpr rpu rra rrb rrc rrd rrp rrr rru rua rub ruc rud ruo rup rur ruu ua- uaa uab uac uad uao uap uar uau uba ubb ubc ubo ubp ubr ubu uca ucb ucc ucd uco ucp ucr ucu uda udb udc udd udo udp udr udu uoa uob uoc uod uoo uop uor up- upa upb upc upd upo upp upr upu ur- ura urb urc urd uro urp urr uru uua uuc uur uuu

a-do aaaa aaab aaac aaad aaap aaar aaba aabb aabc aabd aabp aaca aacb aacc aacd aaco aacp aacr aacu aada aadc aadu aaoo aapa aapc aapo aara aarc aard aaro aarp aaru aaup abaa abab abac abad abap abar abau abb- abba abbb abbo abbr abca abcb abcc abcd abcp abcr abda abdo abdu aboa abob abod aboo abor abou abpa abpc abpd abpp abpr abra abrc abro abua abud acaa acab acac acad acap acar acba acca accc accd acco accp accu acda acdb acdc acdp acoa acod acop acor acou acpa acpd acpr acpu acr- acra acrc acro acrr acu- acuo acup acur adaa adab adac adad adao adap adar adba adbc adcc adda addc addd addo addr addu adob adoc adod adoo ador adp- adra adro adua adub adur aoba aoca aopo aora aorb apac apao apap apar apba apbr apca apcb apcc apcd apco apcr apda apdd apdu apo- apoc apod apoo apop apor apou appa appc appd appr appu apra aprc apro apua apuc apud apup arab arac arad arap arar arau arba arc- arca arco arda ardc ardo ardu aroa arob arod aroo aror arpa arpu arr- arra arrc arro arrr arru arua arub arud arup auaa auca aucp audc audo aupc aur- aura aurd auro baaa baad baar baba babb babo babr babu bac- baca bacc baco bada badb badd bado badr badu bapa bapc bapp bapu bar- bara barb barc bard baro barr baru bau- baud baur bbad bbau bbbb bbdd bbdo bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcda bcor bcpp bcra bcru bcuc bcup bd-r bdbc bddc bdpc boab boac boad boar boba bobb bobo bobu boca boco bocu boda bodb bodo bodu boob booc bood boop boor bopa bopp bor- bora bord boro borr boru boua boud boup bour bpcp bpda bprc bprd brab brac brad brao brau brca brcb brda brdo broa brob broc brod broo bror brou brrr bruc brud brup buad buar buba bubb bubo bubu buca bucc buco bucu buda budb budd budo budu bupa bupc bur- bura burb burd buro burp burr buru c-bo c-cd caaa caab caac caap caba cabo cabu cac- caca cacc caco cacr cada cadc cadd cado cadr cadu caod caor capa capb capc capd capo capp capu cara carb carc card caro carp carr cauc cauo caup cbac cbar cbbc cbca cbcc cbcp cbcr cbcu cbdb cbdc cbdo cbpc cbpp cbrd ccaa ccab ccac ccad ccap ccar ccba ccbc ccca cccb cccc cccp cccu ccdc ccdp ccdr ccob ccoc ccod ccpa ccpp ccpr ccra ccrc ccrp ccuc ccup cd-r cdaa cdac cdad cdba cdda cddb cddr coad coba cobb cobo cobu coca coco cocp cocu coda codd coob cood coop copa copd copo copp copr cor- cora corb corc cord coro corp corr coua coub coud coup cour cpaa cpac cpad cpap cpbc cpca