a-a a-b a-z aaa aab aad aam aao aar aas aaz ab- aba abb abd abm abo abr abs abz ad- ada adb add adm ado adr ads adz ama amb amd amm amo amr ams amz aoa aob aod aom aoo aor aos ar- ara arb ard arm aro arr ars arz as- asa asb asd asm aso asr ass asz az- aza azb azd azm azo azs azz baa bab bad bam bao bar bas baz bba bbb bbd bbm bbo bbr bbs bda bdb bdd bdm bdo bdr bds bdz bma bmb bmd bmm bmo bmr bms bmz boa bob bod bom boo bor bos boz bra brb brd brm bro brr brs brz bsa bsb bsd bsm bso bsr bss bza bzd bzo bzr bzs bzz daa dab dad dam dao dar das daz dba dbb dbd dbm dbo dbr dbs dbz dda ddb ddd ddm ddo ddr dds ddz dma dmb dmd dmm dmo dmr dms dmz doa dob dod dom doo dor dos doz dra drb drd drm dro drr drs drz dsa dsb dsd dsm dso dsr dss dsz dza dzb dzd dzo dzr dzs m-o m-r maa mab mad mam mao mar mas maz mba mbb mbd mbm mbo mbr mbs mda mdb mdd mdm mdo mdr mds mdz mma mmb mmd mmm mmo mmr mms mmz moa mob mod mom moo mor mos moz mra mrb mrd mrm mro mrr mrs mrz msa msb msd msm mso msr mss mza mzb mzm oaa oab oad oam oao oar oas ob- oba obb obd obm obo obr obs oda odb odd odm odo odr ods om- oma omb omd omm omo omr oms omz oo- ooa oob ood oom ooo oor oos or- ora orb ord orm oro orr ors orz os- osa osb osd osm oso osr oss oza ozm ozo ozs ozz ra- raa rab rad ram rao rar ras raz rba rbb rbd rbm rbo rbr rbs rda rdb rdd rdm rdo rdr rds rma rmb rmd rmm rmo rmr rms roa rob rod rom roo ror ros roz rra rrb rrd rrm rrr rrs rsa rsb rsd rsm rso rsr rss rza rzb rzm rzo saa sab sad sam sao sar sas saz sba sbb sbd sbm sbo sbr sbs sda sdb sdd sdm sdo sdr sds sdz sma smb smd smm smo smr sms smz soa sob sod som soo sor sos soz sr- sra srb srd srm sro srr srs ss- ssa ssb ssd ssm sso ssr sss ssz sza szd szr zaa zab zad zam zao zar zas zaz zbb zbm zbr zbs zdm zds zma zmb zmd zmm zms zo- zoa zob zod zom zoo zor zos zro zrs zsa zsm zsz zzr zzs zzz