a-a a-b a-c aaa aab aac aad aae aan aao aas aau ab- aba abb abc abd abe abn abo abs abu ac- aca acb acc acd ace acn aco acs acu ad- ada adb adc add ade adn ado ads adu aea aeb aec aed aee aen aeo aes aeu an- ana anb anc and ane ann ano ans anu aoa aob aoc aod aoe aon aoo aos aou as- asa asb asc asd ase asn aso ass asu au- aua aub auc aud aue aun auo aus b-u baa bab bac bad bae ban bao bas bau bba bbb bbc bbd bbe bbn bbo bbs bbu bca bcb bcc bcd bce bcn bco bcs bcu bda bdb bdc bdd bde bdo bds bdu be- bea beb bec bed bee ben beo bes beu bna bnb bnc bnd bne bnn bno bns bnu boa bob boc bod boe bon boo bos bou bsa bsb bsc bsd bse bsn bso bss bsu bua bub buc bud bue bun buo bus buu c-- caa cab cac cad cae can cao cas cau cba cbb cbc cbd cbe cbn cbo cbs cbu cca ccb ccc ccd cce ccn cco ccs ccu cda cdb cdc cdd cde cdn cdo cds cdu ce- cea ceb cec ced cee cen ceo ces ceu cn- cna cnb cnc cnd cne cnn cno cns cnu co- coa cob coc cod coe con coo cos cou csa csb csc csd cse csn cso css csu cua cub cuc cud cue cun cuo cus cuu daa dab dac dad dae dan dao das dau dba dbb dbc dbd dbe dbn dbo dbs dbu dca dcb dcc dcd dce dcn dco dcs dcu dda ddb ddc ddd dde ddn ddo dds ddu de- dea deb dec ded dee den deo des deu dna dnb dnc dnd dne dnn dno dns doa dob doc dod doe don doo dos dou dsa dsb dsc dsd dse dsn dso dss dsu dua dub duc dud due dun duo dus eaa eab eac ead eae ean eao eas eau eba ebb ebc ebd ebe ebn ebo ebs ebu ec- eca ecb ecc ecd ece ecn eco ecs ecu ed- eda edb edc edd ede edn edo eds edu eea eeb eec eed eee een eeo ees en- ena enb enc end ene enn eno ens enu eo- eoa eob eoc eod eoe eon eoo eos eou es- esa esb esc esd ese esn eso ess esu eu- eua eub euc eud eue eun eus naa nab nac nad nae nan nao nas nau nba nbb nbc nbd nbe nbn nbo nbs nbu nca ncb ncc ncd nce ncn nco ncs ncu nda ndb ndc ndd nde ndn ndo nds ndu ne- nea neb nec ned nee nen neo nes neu nna nnb nnc nne nnn nno nns nnu no- noa nob noc nod noe non noo nos nou nsa nsb nsc nsd nse nsn nso nss nsu nua nub nuc nud nue nun nuo nus nuu oaa oab oac oad oae oan oao oas oau ob- oba obb obc obd obe obn obo obs obu oc- oca ocb occ ocd ocn oco ocs ocu oda odb odc odd ode odn odo ods odu oea oeb oec oed oee oen oeo oes on- ona onb onc ond one onn ono ons onu oo- ooa oob ooc ood oon ooo oos os- osa osb osc osd ose osn oso oss osu ou- oua ouc oud oue oun ouo ous saa sab sac sad sae san sao sas sau sba sbb sbc sbd sbe sbn sbo sbs sbu sca scb scc scd sce scn sco scs scu sda sdb sdc sdd sde sdn sdo sds sdu se- sea seb sec sed see sen seo ses seu sna snb snc snd sne snn sno sns snu soa sob soc sod soe son soo sos sou ss- ssa ssb ssc ssd sse ssn sso sss ssu sua sub suc sud sue sun suo sus suu ua- uaa uab uac uad uae uan uao uas uau uba ubb ubc ube ubn ubo ubs ubu uca ucb ucc ucd uce ucn uco ucs ucu uda udb udc udd ude udn udo uds udu uea ueb uec ued uee uen ues un- una unb unc und une unn uno uns unu uoa uob uoc uod uoe uon uoo uos usa usb usc usd use usn uso uss usu uua uuc uue uun uus uuu