a-a a-b aaa aab aad aam aao aar aas aau ab- aba abb abd abm abo abr abs abu ad- ada adb add adm ado adr ads adu ama amb amd amm amo amr ams amu aoa aob aod aom aoo aor aos aou ar- ara arb ard arm aro arr ars aru as- asa asb asd asm aso asr ass asu au- aua aub aud aum auo aur aus b-u baa bab bad bam bao bar bas bau bba bbb bbd bbm bbo bbr bbs bbu bda bdb bdd bdm bdo bdr bds bdu bma bmb bmd bmm bmo bmr bms bmu boa bob bod bom boo bor bos bou bra brb brd brm bro brr brs bru bsa bsb bsd bsm bso bsr bss bsu bua bub bud bum buo bur bus buu daa dab dad dam dao dar das dau dba dbb dbd dbm dbo dbr dbs dbu dda ddb ddd ddm ddo ddr dds ddu dma dmb dmd dmm dmo dmr dms dmu doa dob dod dom doo dor dos dou dra drb drd drm dro drr drs dru dsa dsb dsd dsm dso dsr dss dsu dua dub dud dum duo dur dus m-o m-r maa mab mad mam mao mar mas mau mba mbb mbd mbm mbo mbr mbs mbu mda mdb mdd mdm mdo mdr mds mdu mma mmb mmd mmm mmo mmr mms mmu moa mob mod mom moo mor mos mou mra mrb mrd mrm mro mrr mrs mru msa msb msd msm mso msr mss msu mua mub mud mum mur mus muu oaa oab oad oam oao oar oas oau ob- oba obb obd obm obo obr obs obu oda odb odd odm odo odr ods odu om- oma omb omd omm omo omr oms omu oo- ooa oob ood oom ooo oor oos or- ora orb ord orm oro orr ors oru os- osa osb osd osm oso osr oss osu ou- oua oud oum ouo our ous ra- raa rab rad ram rao rar ras rau rba rbb rbd rbm rbo rbr rbs rbu rda rdb rdd rdm rdo rdr rds rdu rma rmb rmd rmm rmo rmr rms roa rob rod rom roo ror ros rou rra rrb rrd rrm rrr rrs rru rsa rsb rsd rsm rso rsr rss rsu rua rub rud rum ruo rur rus ruu saa sab sad sam sao sar sas sau sba sbb sbd sbm sbo sbr sbs sbu sda sdb sdd sdm sdo sdr sds sdu sma smb smd smm smo smr sms smu soa sob sod som soo sor sos sou sr- sra srb srd srm sro srr srs ss- ssa ssb ssd ssm sso ssr sss ssu sua sub sud sum suo sur sus suu ua- uaa uab uad uam uao uar uas uau uba ubb ubo ubr ubs ubu uda udb udd udm udo udr uds udu um- uma umb umd umm umo umr ums umu uoa uob uod uom uoo uor uos ur- ura urb urd urm uro urr urs uru usa usb usd usm uso usr uss usu uua uum uur uus uuu