a-a a-b a-c aaa aab aac aad aah aao aar aas aau ab- aba abb abc abd abh abo abr abs abu ac- aca acb acc acd ach aco acr acs acu ad- ada adb adc add adh ado adr ads adu aha ahb ahc ahd ahh aho ahr ahs ahu aoa aob aoc aod aoh aoo aor aos aou ar- ara arb arc ard arh aro arr ars aru as- asa asb asc asd ash aso asr ass asu au- aua aub auc aud auh auo aur aus b-u baa bab bac bad bah bao bar bas bau bba bbb bbc bbd bbh bbo bbr bbs bbu bca bcb bcc bcd bch bco bcr bcs bcu bda bdb bdc bdd bdh bdo bdr bds bdu bha bhb bhc bhd bhh bho bhr bhs bhu boa bob boc bod boh boo bor bos bou bra brb brd brh bro brr brs bru bsa bsb bsc bsd bsh bso bsr bss bsu bua bub buc bud buh buo bur bus buu c-- caa cab cac cad cah cao car cas cau cba cbb cbc cbd cbh cbo cbr cbs cbu cca ccb ccc ccd cch cco ccr ccs ccu cda cdb cdc cdd cdh cdo cdr cds cdu ch- cha chb chc chd chh cho chr chs chu co- coa cob coc cod coh coo cor cos cou cra crb crc crd crh cro crr crs cru csa csb csc csd csh cso csr css csu cua cub cuc cud cuh cuo cur cus cuu daa dab dac dad dah dao dar das dau dba dbb dbc dbd dbh dbo dbr dbs dbu dca dcb dcc dcd dco dcr dcs dcu dda ddb ddc ddd ddh ddo ddr dds ddu dh- dha dhb dhc dhd dhh dho dhr dhs dhu doa dob doc dod doh doo dor dos dou dra drb drc drd dro drr drs dru dsa dsb dsc dsd dsh dso dsr dss dsu dua dub duc dud duh duo dur dus haa hab hac had hah hao har has hau hba hbb hbc hbd hbh hbo hbr hbs hbu hca hcb hcc hcd hch hco hcr hcs hda hdb hdc hdd hdh hdo hdr hds hdu hha hhb hhc hhd hhh hho hhr hhs hhu hoa hob hoc hod hoh hoo hor hos hou hr- hra hrb hrc hrd hrh hro hrr hrs hru hsa hsb hsc hsd hsh hsr hss hsu hua hub huc hud huh huo hur hus huu oaa oab oac oad oah oao oar oas oau ob- oba obb obc obd obh obo obr obs obu oc- oca ocb occ ocd och oco ocr ocs ocu oda odb odc odd odh odo odr ods odu oha ohc ohd ohh oho ohr ohs ohu oo- ooa oob ooc ood ooh ooo oor oos or- ora orb orc ord orh oro orr ors oru os- osa osb osc osd osh oso osr oss osu ou- oua ouc oud ouh ouo our ous ra- raa rab rac rad rah rao rar ras rau rba rbb rbc rbd rbh rbo rbr rbs rbu rca rcb rcc rcd rch rco rcr rcs rcu rda rdb rdc rdd rdh rdo rdr rds rdu rh- rha rhb rhc rhd rhh rho rhr rhs rhu roa rob roc rod roh roo ror ros rou rra rrb rrc rrd rrh rrr rrs rru rsa rsb rsc rsd rsh rso rsr rss rsu rua rub ruc rud ruh ruo rur rus ruu saa sab sac sad sah sao sar sas sau sba sbb sbc sbd sbh sbo sbr sbs sbu sca scb scc scd sch sco scr scs scu sda sdb sdc sdd sdh sdo sdr sds sdu sh- sha shb shc shd shh sho shr shs shu soa sob soc sod soh soo sor sos sou sr- sra srb src srd srh sro srr srs ss- ssa ssb ssc ssd ssh sso ssr sss ssu sua sub suc sud suh suo sur sus suu ua- uaa uab uac uad uah uao uar uas uau uba ubb ubc ubh ubo ubr ubs ubu uca ucb ucc ucd uch uco ucr ucs ucu uda udb udc udd udo udr uds udu uha uhb uhc uhd uhh uho uhr uhs uhu uoa uob uoc uod uoo uor uos ur- ura urb urc urd uro urr urs uru usa usb usc usd ush uso usr uss usu uua uuc uur uus uuu