a-a a-b a-z aaa aab aad aae aam aao aaz ab- aba abb abd abe abm abo abz ad- ada adb add ade adm ado adz aea aeb aed aee aem aeo aez ama amb amd ame amm amo amz aoa aob aod aoe aom aoo az- aza azb azd aze azm azo azz baa bab bad bae bam bao baz bba bbb bbd bbe bbm bbo bda bdb bdd bde bdm bdo bdz be- bea beb bed bee bem beo bez bma bmb bmd bme bmm bmo bmz boa bob bod boe bom boo boz bza bzd bze bzo bzz daa dab dad dae dam dao daz dba dbb dbd dbe dbm dbo dbz dda ddb ddd dde ddm ddo ddz de- dea deb ded dee dem deo dez dma dmb dmd dme dmm dmo dmz doa dob dod doe dom doo doz dza dzb dzd dze dzo eaa eab ead eae eam eao eaz eba ebb ebd ebe ebm ebo ed- eda edb edd ede edm edo eea eeb eed eee eem eeo em- ema emb emd eme emm emo eo- eoa eob eod eoe eom eoo eze ezo ezz m-o maa mab mad mae mam mao maz mba mbb mbd mbe mbm mbo mda mdb mdd mde mdm mdo mdz mea meb med mee mem meo mez mma mmb mmd mme mmm mmo mmz moa mob mod moe mom moo moz mza mzb mzm oaa oab oad oae oam oao ob- oba obb obd obe obm obo oda odb odd ode odm odo oea oeb oed oee oem oeo om- oma omb omd ome omm omo omz oo- ooa oob ood oom ooo oza oze ozm ozo ozz zaa zab zad zam zao zaz zbb zbm zdm zea zeb zed zee zem zeo zez zma zmb zmd zmm zo- zoa zob zod zoe zom zoo zzz