a-a a-b a-c aaa aab aac aad aah aan aao aar aas aau ab- aba abb abc abd abh abn abo abr abs abu ac- aca acb acc acd ach acn aco acr acs acu ad- ada adb adc add adh adn ado adr ads adu aha ahb ahc ahd ahh ahn aho ahr ahs ahu an- ana anb anc and anh ann ano anr ans anu aoa aob aoc aod aoh aon aoo aor aos aou ar- ara arb arc ard arh arn aro arr ars aru as- asa asb asc asd ash asn aso asr ass asu au- aua aub auc aud auh aun auo aur aus b-u baa bab bac bad bah ban bao bar bas bau bba bbb bbc bbd bbh bbn bbo bbr bbs bbu bca bcb bcc bcd bch bcn bco bcr bcs bcu bda bdb bdc bdd bdh bdo bdr bds bdu bha bhb bhc bhd bhh bho bhr bhs bhu bna bnb bnc bnd bnn bno bnr bns bnu boa bob boc bod boh bon boo bor bos bou bra brb brd brh brn bro brr brs bru bsa bsb bsc bsd bsh bsn bso bsr bss bsu bua bub buc bud buh bun buo bur bus buu c-- caa cab cac cad cah can cao car cas cau cba cbb cbc cbd cbh cbn cbo cbr cbs cbu cca ccb ccc ccd cch ccn cco ccr ccs ccu cda cdb cdc cdd cdh cdn cdo cdr cds cdu ch- cha chb chc chd chh chn cho chr chs chu cn- cna cnb cnc cnd cnh cnn cno cnr cns cnu co- coa cob coc cod coh con coo cor cos cou cra crb crc crd crh crn cro crr crs cru csa csb csc csd csh csn cso csr css csu cua cub cuc cud cuh cun cuo cur cus cuu daa dab dac dad dah dan dao dar das dau dba dbb dbc dbd dbh dbn dbo dbr dbs dbu dca dcb dcc dcd dcn dco dcr dcs dcu dda ddb ddc ddd ddh ddn ddo ddr dds ddu dh- dha dhb dhc dhd dhh dho dhr dhs dhu dna dnb dnc dnd dnh dnn dno dnr dns doa dob doc dod doh don doo dor dos dou dra drb drc drd drn dro drr drs dru dsa dsb dsc dsd dsh dsn dso dsr dss dsu dua dub duc dud duh dun duo dur dus haa hab hac had hah han hao har has hau hba hbb hbc hbd hbh hbn hbo hbr hbs hbu hca hcb hcc hcd hch hcn hco hcr hcs hda hdb hdc hdd hdh hdn hdo hdr hds hdu hha hhb hhc hhd hhh hhn hho hhr hhs hhu hna hnb hnc hnd hnh hnn hno hns hnu hoa hob hoc hod hoh hon hoo hor hos hou hr- hra hrb hrc hrd hrh hrn hro hrr hrs hru hsa hsb hsc hsd hsh hsn hsr hss hsu hua hub huc hud huh hun huo hur hus huu naa nab nac nad nah nan nao nar nas nau nba nbb nbc nbd nbn nbo nbr nbs nbu nca ncb ncc ncd nch ncn nco ncr ncs ncu nda ndb ndc ndd ndh ndn ndo ndr nds ndu nha nhb nhc nhd nhh nhn nhr nhs nhu nna nnb nnc nnh nnn nno nns nnu no- noa nob noc nod noh non noo nor nos nou nra nrb nrc nrd nrn nro nrr nrs nru nsa nsb nsc nsd nsh nsn nso nsr nss nsu nua nub nuc nud nuh nun nuo nur nus nuu oaa oab oac oad oah oan oao oar oas oau ob- oba obb obc obd obh obn obo obr obs obu oc- oca ocb occ ocd och ocn oco ocr ocs ocu oda odb odc odd odh odn odo odr ods odu oha ohc ohd ohh ohn oho ohr ohs ohu on- ona onb onc ond onh onn ono onr ons onu oo- ooa oob ooc ood ooh oon ooo oor oos or- ora orb orc ord orh orn oro orr ors oru os- osa osb osc osd osh osn oso osr oss osu ou- oua ouc oud ouh oun ouo our ous ra- raa rab rac rad rah ran rao rar ras rau rba rbb rbc rbd rbh rbn rbo rbr rbs rbu rca rcb rcc rcd rch rcn rco rcr rcs rcu rda rdb rdc rdd rdh rdn rdo rdr rds rdu rh- rha rhb rhc rhd rhh rhn rho rhr rhs rhu rna rnb rnc rnd rnh rnn rno rnr rns rnu roa rob roc rod roh ron roo ror ros rou rra rrb rrc rrd rrh rrn rrr rrs rru rsa rsb rsc rsd rsh rsn rso rsr rss rsu rua rub ruc rud ruh run ruo rur rus ruu saa sab sac sad sah san sao sar sas sau sba sbb sbc sbd sbh sbn sbo sbr sbs sbu sca scb scc scd sch scn sco scr scs scu sda sdb sdc sdd sdh sdn sdo sdr sds sdu sh- sha shb shc shd shh shn sho shr shs shu sna snb snc snd snn sno snr sns snu soa sob soc sod soh son soo sor sos sou sr- sra srb src srd srh srn sro srr srs ss- ssa ssb ssc ssd ssh ssn sso ssr sss ssu sua sub suc sud suh sun suo sur sus suu ua- uaa uab uac uad uah uan uao uar uas uau uba ubb ubc ubh ubn ubo ubr ubs ubu uca ucb ucc ucd uch ucn uco ucr ucs ucu uda udb udc udd udn udo udr uds udu uha uhb uhc uhd uhh uho uhr uhs uhu un- una unb unc und unh unn uno unr uns unu uoa uob uoc uod uon uoo uor uos ur- ura urb urc urd urn uro urr urs uru usa usb usc usd ush usn uso usr uss usu uua uuc uun uur uus uuu

-ana -hou