a-a a-b aaa aab aad aae aaf aam aao aau ab- aba abb abd abe abf abm abo abu ad- ada adb add ade adf adm ado adu aea aeb aed aee aef aem aeo aeu af- afa afb afd afe aff afm afo afu ama amb amd ame amf amm amo amu aoa aob aod aoe aof aom aoo aou au- aua aub aud aue auf aum auo b-u baa bab bad bae baf bam bao bau bba bbb bbd bbe bbf bbm bbo bbu bda bdb bdd bde bdf bdm bdo bdu be- bea beb bed bee bef bem beo beu bfa bfb bfd bfe bff bfm bfo bfu bma bmb bmd bme bmf bmm bmo bmu boa bob bod boe bof bom boo bou bua bub bud bue buf bum buo buu daa dab dad dae daf dam dao dau dba dbb dbd dbe dbf dbm dbo dbu dda ddb ddd dde ddf ddm ddo ddu de- dea deb ded dee def dem deo deu dfa dfb dfd dfe dff dfm dfo dfu dma dmb dmd dme dmf dmm dmo dmu doa dob dod doe dof dom doo dou dua dub dud due duf dum duo eaa eab ead eae eaf eam eao eau eba ebb ebd ebe ebf ebm ebo ebu ed- eda edb edd ede edf edm edo edu eea eeb eed eee eef eem eeo ef- efa efb efd efe eff efm efo em- ema emb emd eme emf emm emo emu eo- eoa eob eod eoe eof eom eoo eou eu- eua eub eud eue euf faa fab fad fae faf fam fao fau fba fbb fbd fbe fbf fbm fbo fbu fda fdb fdd fde fdf fdm fdo fdu fea feb fed fee fef fem feo feu ffa ffd ffe fff ffm ffo ffu fma fmb fmd fme fmf fmm fmo fmu foa fob foe fof fom foo fou fua fub fud fue fuf fum fuo fuu m-f m-o maa mab mad mae maf mam mao mau mba mbb mbd mbe mbf mbm mbo mbu mda mdb mdd mde mdf mdm mdo mdu mea meb med mee mef mem meo meu mfa mfb mfd mfe mff mfm mfo mfu mma mmb mmd mme mmf mmm mmo mmu moa mob mod moe mof mom moo mou mua mub mud mue muf mum muu oaa oab oad oae oaf oam oao oau ob- oba obb obd obe obf obm obo obu oda odb odd ode odf odm odo odu oea oeb oed oee oef oem oeo of- ofa ofb ofd ofe off ofm ofo ofu om- oma omb omd ome omf omm omo omu oo- ooa oob ood oof oom ooo ou- oua oud oue ouf oum ouo ua- uaa uab uad uae uaf uam uao uau uba ubb ube ubf ubo ubu uda udb udd ude udf udm udo udu uea ueb ued uee uef uem ufa ufd ufe uff ufm ufo ufu um- uma umb umd ume umf umm umo umu uoa uob uod uoe uom uoo uua uue uum uuu