a-a a-b a-c aaa aab aac aad aae aah aan aas aau ab- aba abb abc abd abe abh abn abs abu ac- aca acb acc acd ace ach acn acs acu ad- ada adb adc add ade adh adn ads adu aea aeb aec aed aee aeh aen aes aeu aha ahb ahc ahd ahe ahh ahn ahs ahu an- ana anb anc and ane anh ann ans anu as- asa asb asc asd ase ash asn ass asu au- aua aub auc aud aue auh aun aus b-u baa bab bac bad bae bah ban bas bau bba bbb bbc bbd bbe bbh bbn bbs bbu bca bcb bcc bcd bce bch bcn bcs bcu bda bdb bdc bdd bde bdh bds bdu be- bea beb bec bed bee beh ben bes beu bha bhb bhc bhd bhe bhh bhs bhu bna bnb bnc bnd bne bnn bns bnu bsa bsb bsc bsd bse bsh bsn bss bsu bua bub buc bud bue buh bun bus buu c-- caa cab cac cad cae cah can cas cau cba cbb cbc cbd cbe cbh cbn cbs cbu cca ccb ccc ccd cce cch ccn ccs ccu cda cdb cdc cdd cde cdh cdn cds cdu ce- cea ceb cec ced cee ceh cen ces ceu ch- cha chb chc chd che chh chn chs chu cn- cna cnb cnc cnd cne cnh cnn cns cnu csa csb csc csd cse csh csn css csu cua cub cuc cud cue cuh cun cus cuu daa dab dac dad dae dah dan das dau dba dbb dbc dbd dbe dbh dbn dbs dbu dca dcb dcc dcd dce dcn dcs dcu dda ddb ddc ddd dde ddh ddn dds ddu de- dea deb dec ded dee deh den des deu dh- dha dhb dhc dhd dhe dhh dhs dhu dna dnb dnc dnd dne dnh dnn dns dsa dsb dsc dsd dse dsh dsn dss dsu dua dub duc dud due duh dun dus eaa eab eac ead eae eah ean eas eau eba ebb ebc ebd ebe ebh ebn ebs ebu ec- eca ecb ecc ecd ece ech ecn ecs ecu ed- eda edb edc edd ede edh edn eds edu eea eeb eec eed eee een ees eha ehb ehc ehd ehe ehh ehn ehs ehu en- ena enb enc end ene enh enn ens enu es- esa esb esc esd ese esh esn ess esu eu- eua eub euc eud eue eun eus haa hab hac had hae hah han has hau hba hbb hbc hbd hbe hbh hbn hbs hbu hca hcb hcc hcd hce hch hcn hcs hda hdb hdc hdd hde hdh hdn hds hdu he- hea heb hec hed hee heh hen hes heu hha hhb hhc hhd hhe hhh hhn hhs hhu hna hnb hnc hnd hne hnh hnn hns hnu hsa hsb hsc hsd hse hsh hsn hss hsu hua hub huc hud hue huh hun hus huu naa nab nac nad nae nah nan nas nau nba nbb nbc nbd nbe nbn nbs nbu nca ncb ncc ncd nce nch ncn ncs ncu nda ndb ndc ndd nde ndh ndn nds ndu ne- nea neb nec ned nee neh nen nes neu nha nhb nhc nhd nhe nhh nhn nhs nhu nna nnb nnc nne nnh nnn nns nnu nsa nsb nsc nsd nse nsh nsn nss nsu nua nub nuc nud nue nuh nun nus nuu saa sab sac sad sae sah san sas sau sba sbb sbc sbd sbe sbh sbn sbs sbu sca scb scc scd sce sch scn scs scu sda sdb sdc sdd sde sdh sdn sds sdu se- sea seb sec sed see seh sen ses seu sh- sha shb shc shd she shh shn shs shu sna snb snc snd sne snn sns snu ss- ssa ssb ssc ssd sse ssh ssn sss ssu sua sub suc sud sue suh sun sus suu ua- uaa uab uac uad uae uah uan uas uau uba ubb ubc ube ubh ubn ubs ubu uca ucb ucc ucd uce uch ucn ucs ucu uda udb udc udd ude udn uds udu uea ueb uec ued uee ueh uen ues uha uhb uhc uhd uhe uhh uhs uhu un- una unb unc und une unh unn uns unu usa usb usc usd use ush usn uss usu uua uuc uue uun uus uuu