a-a a-b a-c aaa aab aac aad aah aan aar aas aau ab- aba abb abc abd abh abn abr abs abu ac- aca acb acc acd ach acn acr acs acu ad- ada adb adc add adh adn adr ads adu aha ahb ahc ahd ahh ahn ahr ahs ahu an- ana anb anc and anh ann anr ans anu ar- ara arb arc ard arh arn arr ars aru as- asa asb asc asd ash asn asr ass asu au- aua aub auc aud auh aun aur aus b-u baa bab bac bad bah ban bar bas bau bba bbb bbc bbd bbh bbn bbr bbs bbu bca bcb bcc bcd bch bcn bcr bcs bcu bda bdb bdc bdd bdh bdr bds bdu bha bhb bhc bhd bhh bhr bhs bhu bna bnb bnc bnd bnn bnr bns bnu bra brb brd brh brn brr brs bru bsa bsb bsc bsd bsh bsn bsr bss bsu bua bub buc bud buh bun bur bus buu c-- caa cab cac cad cah can car cas cau cba cbb cbc cbd cbh cbn cbr cbs cbu cca ccb ccc ccd cch ccn ccr ccs ccu cda cdb cdc cdd cdh cdn cdr cds cdu ch- cha chb chc chd chh chn chr chs chu cn- cna cnb cnc cnd cnh cnn cnr cns cnu cra crb crc crd crh crn crr crs cru csa csb csc csd csh csn csr css csu cua cub cuc cud cuh cun cur cus cuu daa dab dac dad dah dan dar das dau dba dbb dbc dbd dbh dbn dbr dbs dbu dca dcb dcc dcd dcn dcr dcs dcu dda ddb ddc ddd ddh ddn ddr dds ddu dh- dha dhb dhc dhd dhh dhr dhs dhu dna dnb dnc dnd dnh dnn dnr dns dra drb drc drd drn drr drs dru dsa dsb dsc dsd dsh dsn dsr dss dsu dua dub duc dud duh dun dur dus haa hab hac had hah han har has hau hba hbb hbc hbd hbh hbn hbr hbs hbu hca hcb hcc hcd hch hcn hcr hcs hda hdb hdc hdd hdh hdn hdr hds hdu hha hhb hhc hhd hhh hhn hhr hhs hhu hna hnb hnc hnd hnh hnn hns hnu hr- hra hrb hrc hrd hrh hrn hrr hrs hru hsa hsb hsc hsd hsh hsn hsr hss hsu hua hub huc hud huh hun hur hus huu naa nab nac nad nah nan nar nas nau nba nbb nbc nbd nbn nbr nbs nbu nca ncb ncc ncd nch ncn ncr ncs ncu nda ndb ndc ndd ndh ndn ndr nds ndu nha nhb nhc nhd nhh nhn nhr nhs nhu nna nnb nnc nnh nnn nns nnu nra nrb nrc nrd nrn nrr nrs nru nsa nsb nsc nsd nsh nsn nsr nss nsu nua nub nuc nud nuh nun nur nus nuu ra- raa rab rac rad rah ran rar ras rau rba rbb rbc rbd rbh rbn rbr rbs rbu rca rcb rcc rcd rch rcn rcr rcs rcu rda rdb rdc rdd rdh rdn rdr rds rdu rh- rha rhb rhc rhd rhh rhn rhr rhs rhu rna rnb rnc rnd rnh rnn rnr rns rnu rra rrb rrc rrd rrh rrn rrr rrs rru rsa rsb rsc rsd rsh rsn rsr rss rsu rua rub ruc rud ruh run rur rus ruu saa sab sac sad sah san sar sas sau sba sbb sbc sbd sbh sbn sbr sbs sbu sca scb scc scd sch scn scr scs scu sda sdb sdc sdd sdh sdn sdr sds sdu sh- sha shb shc shd shh shn shr shs shu sna snb snc snd snn snr sns snu sr- sra srb src srd srh srn srr srs ss- ssa ssb ssc ssd ssh ssn ssr sss ssu sua sub suc sud suh sun sur sus suu ua- uaa uab uac uad uah uan uar uas uau uba ubb ubc ubh ubn ubr ubs ubu uca ucb ucc ucd uch ucn ucr ucs ucu uda udb udc udd udn udr uds udu uha uhb uhc uhd uhh uhr uhs uhu un- una unb unc und unh unn unr uns unu ur- ura urb urc urd urn urr urs uru usa usb usc usd ush usn usr uss usu uua uuc uun uur uus uuu