a-a a-b a-c aaa aab aac aad aah aan aao aas aau ab- aba abb abc abd abh abn abo abs abu ac- aca acb acc acd ach acn aco acs acu ad- ada adb adc add adh adn ado ads adu aha ahb ahc ahd ahh ahn aho ahs ahu an- ana anb anc and anh ann ano ans anu aoa aob aoc aod aoh aon aoo aos aou as- asa asb asc asd ash asn aso ass asu au- aua aub auc aud auh aun auo aus b-u baa bab bac bad bah ban bao bas bau bba bbb bbc bbd bbh bbn bbo bbs bbu bca bcb bcc bcd bch bcn bco bcs bcu bda bdb bdc bdd bdh bdo bds bdu bha bhb bhc bhd bhh bho bhs bhu bna bnb bnc bnd bnn bno bns bnu boa bob boc bod boh bon boo bos bou bsa bsb bsc bsd bsh bsn bso bss bsu bua bub buc bud buh bun buo bus buu c-- caa cab cac cad cah can cao cas cau cba cbb cbc cbd cbh cbn cbo cbs cbu cca ccb ccc ccd cch ccn cco ccs ccu cda cdb cdc cdd cdh cdn cdo cds cdu ch- cha chb chc chd chh chn cho chs chu cn- cna cnb cnc cnd cnh cnn cno cns cnu co- coa cob coc cod coh con coo cos cou csa csb csc csd csh csn cso css csu cua cub cuc cud cuh cun cuo cus cuu daa dab dac dad dah dan dao das dau dba dbb dbc dbd dbh dbn dbo dbs dbu dca dcb dcc dcd dcn dco dcs dcu dda ddb ddc ddd ddh ddn ddo dds ddu dh- dha dhb dhc dhd dhh dho dhs dhu dna dnb dnc dnd dnh dnn dno dns doa dob doc dod doh don doo dos dou dsa dsb dsc dsd dsh dsn dso dss dsu dua dub duc dud duh dun duo dus haa hab hac had hah han hao has hau hba hbb hbc hbd hbh hbn hbo hbs hbu hca hcb hcc hcd hch hcn hco hcs hda hdb hdc hdd hdh hdn hdo hds hdu hha hhb hhc hhd hhh hhn hho hhs hhu hna hnb hnc hnd hnh hnn hno hns hnu hoa hob hoc hod hoh hon hoo hos hou hsa hsb hsc hsd hsh hsn hss hsu hua hub huc hud huh hun huo hus huu naa nab nac nad nah nan nao nas nau nba nbb nbc nbd nbn nbo nbs nbu nca ncb ncc ncd nch ncn nco ncs ncu nda ndb ndc ndd ndh ndn ndo nds ndu nha nhb nhc nhd nhh nhn nhs nhu nna nnb nnc nnh nnn nno nns nnu no- noa nob noc nod noh non noo nos nou nsa nsb nsc nsd nsh nsn nso nss nsu nua nub nuc nud nuh nun nuo nus nuu oaa oab oac oad oah oan oao oas oau ob- oba obb obc obd obh obn obo obs obu oc- oca ocb occ ocd och ocn oco ocs ocu oda odb odc odd odh odn odo ods odu oha ohc ohd ohh ohn oho ohs ohu on- ona onb onc ond onh onn ono ons onu oo- ooa oob ooc ood ooh oon ooo oos os- osa osb osc osd osh osn oso oss osu ou- oua ouc oud ouh oun ouo ous saa sab sac sad sah san sao sas sau sba sbb sbc sbd sbh sbn sbo sbs sbu sca scb scc scd sch scn sco scs scu sda sdb sdc sdd sdh sdn sdo sds sdu sh- sha shb shc shd shh shn sho shs shu sna snb snc snd snn sno sns snu soa sob soc sod soh son soo sos sou ss- ssa ssb ssc ssd ssh ssn sso sss ssu sua sub suc sud suh sun suo sus suu ua- uaa uab uac uad uah uan uao uas uau uba ubb ubc ubh ubn ubo ubs ubu uca ucb ucc ucd uch ucn uco ucs ucu uda udb udc udd udn udo uds udu uha uhb uhc uhd uhh uho uhs uhu un- una unb unc und unh unn uno uns unu uoa uob uoc uod uon uoo uos usa usb usc usd ush usn uso uss usu uua uuc uun uus uuu