a-a a-b aaa aab aad aam aao aar aau ab- aba abb abd abm abo abr abu ad- ada adb add adm ado adr adu ama amb amd amm amo amr amu aoa aob aod aom aoo aor aou ar- ara arb ard arm aro arr aru au- aua aub aud aum auo aur b-u baa bab bad bam bao bar bau bba bbb bbd bbm bbo bbr bbu bda bdb bdd bdm bdo bdr bdu bma bmb bmd bmm bmo bmr bmu boa bob bod bom boo bor bou bra brb brd brm bro brr bru bua bub bud bum buo bur buu daa dab dad dam dao dar dau dba dbb dbd dbm dbo dbr dbu dda ddb ddd ddm ddo ddr ddu dma dmb dmd dmm dmo dmr dmu doa dob dod dom doo dor dou dra drb drd drm dro drr dru dua dub dud dum duo dur m-o m-r maa mab mad mam mao mar mau mba mbb mbd mbm mbo mbr mbu mda mdb mdd mdm mdo mdr mdu mma mmb mmd mmm mmo mmr mmu moa mob mod mom moo mor mou mra mrb mrd mrm mro mrr mru mua mub mud mum mur muu oaa oab oad oam oao oar oau ob- oba obb obd obm obo obr obu oda odb odd odm odo odr odu om- oma omb omd omm omo omr omu oo- ooa oob ood oom ooo oor or- ora orb ord orm oro orr oru ou- oua oud oum ouo our ra- raa rab rad ram rao rar rau rba rbb rbd rbm rbo rbr rbu rda rdb rdd rdm rdo rdr rdu rma rmb rmd rmm rmo rmr roa rob rod rom roo ror rou rra rrb rrd rrm rrr rru rua rub rud rum ruo rur ruu ua- uaa uab uad uam uao uar uau uba ubb ubo ubr ubu uda udb udd udm udo udr udu um- uma umb umd umm umo umr umu uoa uob uod uom uoo uor ur- ura urb urd urm uro urr uru uua uum uur uuu