-er a-a a-b a-i aaa aab aad aae aai aam aao aar aax ab- aba abb abd abe abi abm abo abr abx ad- ada adb add ade adi adm ado adr adx aea aeb aed aee aei aem aeo aer aex ai- aia aib aid aie aii aim aio air aix ama amb amd ame ami amm amo amr amx aoa aob aod aoe aoi aom aoo aor aox ar- ara arb ard are ari arm aro arr arx ax- axa axe axi axm axo axr axx baa bab bad bae bai bam bao bar bax bba bbb bbd bbe bbi bbm bbo bbr bbx bda bdb bdd bde bdi bdm bdo bdr bdx be- bea beb bed bee bei bem beo ber bex bi- bia bib bid bie bii bim bio bir bix bma bmb bmd bme bmi bmm bmo bmr bmx boa bob bod boe boi bom boo bor box bra brb brd bre bri brm bro brr brx bxb bxd bxi bxm bxo bxx daa dab dad dae dai dam dao dar dax dba dbb dbd dbe dbi dbm dbo dbr dbx dda ddb ddd dde ddi ddm ddo ddr ddx de- dea deb ded dee dei dem deo der dex di- dia dib did die dii dim dio dir dix dma dmb dmd dme dmi dmm dmo dmr dmx doa dob dod doe doi dom doo dor dox dra drb drd dre dri drm dro drr drx dxd dxi dxo dxr dxx eaa eab ead eae eai eam eao ear eax eba ebb ebd ebe ebi ebm ebo ebr ebx ed- eda edb edd ede edi edm edo edr edx eea eeb eed eee eem eeo eer eex eia eib eid eie eii eim eio eir eix em- ema emb emd eme emi emm emo emr emx eo- eoa eob eod eoe eoi eom eoo eor era erb erd ere eri erm ero err ex- exa exd exe exi exo exr exx i-d ia- iaa iab iad iae iai iam iao iar iba ibb ibd ibe ibi ibm ibo ibr ibx ida idb idd ide idi idm ido idr idx ie- iea ied iee iei iem ier iex iia iib iid iie iii iim iio iir iix im- ima imb imd ime imi imm imo imx io- ioa iob iod ioe ioi iom ioo ior ir- ira irb ird ire iri irm iro irr irx ixe ixi m-o m-r maa mab mad mae mai mam mao mar max mba mbb mbd mbe mbi mbm mbo mbr mbx mda mdb mdd mde mdi mdm mdo mdr mdx mea meb med mee mei mem meo mer mex mi- mia mib mid mie mii mim mio mir mix mma mmb mmd mme mmi mmm mmo mmr mmx moa mob mod moe moi mom moo mor mox mra mrb mrd mre mri mrm mro mrr mrx mxa mxd mxi mxr o-i oaa oab oad oae oai oam oao oar oax ob- oba obb obd obe obi obm obo obr obx oda odb odd ode odi odm odo odr oea oeb oed oee oei oem oeo oer oex oia oib oid oie oii oim oio oir om- oma omb omd ome omi omm omo omr omx oo- ooa oob ood ooi oom ooo oor oox or- ora orb ord ore ori orm oro orr orx ox- oxa oxb oxi oxo oxx ra- raa rab rad rae rai ram rao rar rax rba rbb rbd rbe rbi rbm rbo rbr rbx rda rdb rdd rde rdi rdm rdo rdr rdx re- rea reb red ree rei rem reo rer rex ria rib rid rie rii rim rio rir rix rma rmb rmd rme rmi rmm rmo rmr rmx roa rob rod roe roi rom roo ror rox rra rrb rrd rri rrm rrr rxr xaa xad xam xar xbe xbr xbx xda xdb xde xdi xdm xdr xed xee xem xer xex xia xie xii xio xix xma xmd xmi xmm xmo xmr xmx xoa xod xoi xom xoo xor xox xrd xrx xxi xxo xxx