a-a a-b aaa aab aad aah aao aar aas aau ab- aba abb abd abh abo abr abs abu ad- ada adb add adh ado adr ads adu aha ahb ahd ahh aho ahr ahs ahu aoa aob aod aoh aoo aor aos aou ar- ara arb ard arh aro arr ars aru as- asa asb asd ash aso asr ass asu au- aua aub aud auh auo aur aus b-u baa bab bad bah bao bar bas bau bba bbb bbd bbh bbo bbr bbs bbu bda bdb bdd bdh bdo bdr bds bdu bha bhb bhd bhh bho bhr bhs bhu boa bob bod boh boo bor bos bou bra brb brd brh bro brr brs bru bsa bsb bsd bsh bso bsr bss bsu bua bub bud buh buo bur bus buu daa dab dad dah dao dar das dau dba dbb dbd dbh dbo dbr dbs dbu dda ddb ddd ddh ddo ddr dds ddu dh- dha dhb dhd dhh dho dhr dhs dhu doa dob dod doh doo dor dos dou dra drb drd dro drr drs dru dsa dsb dsd dsh dso dsr dss dsu dua dub dud duh duo dur dus haa hab had hah hao har has hau hba hbb hbd hbh hbo hbr hbs hbu hda hdb hdd hdh hdo hdr hds hdu hha hhb hhd hhh hho hhr hhs hhu hoa hob hod hoh hoo hor hos hou hr- hra hrb hrd hrh hro hrr hrs hru hsa hsb hsd hsh hsr hss hsu hua hub hud huh huo hur hus huu oaa oab oad oah oao oar oas oau ob- oba obb obd obh obo obr obs obu oda odb odd odh odo odr ods odu oha ohd ohh oho ohr ohs ohu oo- ooa oob ood ooh ooo oor oos or- ora orb ord orh oro orr ors oru os- osa osb osd osh oso osr oss osu ou- oua oud ouh ouo our ous ra- raa rab rad rah rao rar ras rau rba rbb rbd rbh rbo rbr rbs rbu rda rdb rdd rdh rdo rdr rds rdu rh- rha rhb rhd rhh rho rhr rhs rhu roa rob rod roh roo ror ros rou rra rrb rrd rrh rrr rrs rru rsa rsb rsd rsh rso rsr rss rsu rua rub rud ruh ruo rur rus ruu saa sab sad sah sao sar sas sau sba sbb sbd sbh sbo sbr sbs sbu sda sdb sdd sdh sdo sdr sds sdu sh- sha shb shd shh sho shr shs shu soa sob sod soh soo sor sos sou sr- sra srb srd srh sro srr srs ss- ssa ssb ssd ssh sso ssr sss ssu sua sub sud suh suo sur sus suu ua- uaa uab uad uah uao uar uas uau uba ubb ubh ubo ubr ubs ubu uda udb udd udo udr uds udu uha uhb uhd uhh uho uhr uhs uhu uoa uob uod uoo uor uos ur- ura urb urd uro urr urs uru usa usb usd ush uso usr uss usu uua uur uus uuu