-er a-a a-b a-i a-t aaa aab aad aae aai aam aao aar aat ab- aba abb abd abe abi abm abo abr abt ad- ada adb add ade adi adm ado adr adt aea aeb aed aee aei aem aeo aer aet ai- aia aib aid aie aii aim aio air ait ama amb amd ame ami amm amo amr amt aoa aob aod aoe aoi aom aoo aor aot ar- ara arb ard are ari arm aro arr art at- ata atb atd ate ati atm ato atr att baa bab bad bae bai bam bao bar bat bba bbb bbd bbe bbi bbm bbo bbr bbt bda bdb bdd bde bdi bdm bdo bdr bdt be- bea beb bed bee bei bem beo ber bet bi- bia bib bid bie bii bim bio bir bit bma bmb bmd bme bmi bmm bmo bmr bmt boa bob bod boe boi bom boo bor bot bra brb brd bre bri brm bro brr brt bta btb btd bte bti btm bto btr btt daa dab dad dae dai dam dao dar dat dba dbb dbd dbe dbi dbm dbo dbr dbt dda ddb ddd dde ddi ddm ddo ddr ddt de- dea deb ded dee dei dem deo der det di- dia dib did die dii dim dio dir dit dma dmb dmd dme dmi dmm dmo dmr dmt doa dob dod doe doi dom doo dor dot dra drb drd dre dri drm dro drr drt dta dtb dtd dte dti dtm dto dtr dtt eaa eab ead eae eai eam eao ear eat eba ebb ebd ebe ebi ebm ebo ebr ebt ed- eda edb edd ede edi edm edo edr edt eea eeb eed eee eem eeo eer eet eia eib eid eie eii eim eio eir eit em- ema emb emd eme emi emm emo emr emt eo- eoa eob eod eoe eoi eom eoo eor eot era erb erd ere eri erm ero err ert eta etb etd ete eti etm eto etr ett i-d ia- iaa iab iad iae iai iam iao iar iat iba ibb ibd ibe ibi ibm ibo ibr ibt ida idb idd ide idi idm ido idr idt ie- iea ied iee iei iem ier iet iia iib iid iie iii iim iio iir iit im- ima imb imd ime imi imm imo imt io- ioa iob iod ioe ioi iom ioo ior iot ir- ira irb ird ire iri irm iro irr irt ita itb itd ite iti itm ito itt m-o m-r maa mab mad mae mai mam mao mar mat mba mbb mbd mbe mbi mbm mbo mbr mbt mda mdb mdd mde mdi mdm mdo mdr mdt mea meb med mee mei mem meo mer met mi- mia mib mid mie mii mim mio mir mit mma mmb mmd mme mmi mmm mmo mmr mmt moa mob mod moe moi mom moo mor mot mra mrb mrd mre mri mrm mro mrr mrt mta mtb mtd mte mti mtm mto mtr mtt o-i oaa oab oad oae oai oam oao oar oat ob- oba obb obd obe obi obm obo obr obt oda odb odd ode odi odm odo odr odt oea oeb oed oee oei oem oeo oer oet oia oib oid oie oii oim oio oir oit om- oma omb omd ome omi omm omo omr omt oo- ooa oob ood ooi oom ooo oor oot or- ora orb ord ore ori orm oro orr ort ot- ota otb otd ote oti otm oto otr ott ra- raa rab rad rae rai ram rao rar rat rba rbb rbd rbe rbi rbm rbo rbr rbt rda rdb rdd rde rdi rdm rdo rdr rdt re- rea reb red ree rei rem reo rer ret ria rib rid rie rii rim rio rir rit rma rmb rmd rme rmi rmm rmo rmr rmt roa rob rod roe roi rom roo ror rot rra rrb rrd rri rrm rrr rrt rta rtb rtd rte rti rtm rto rtr rtt taa tab tad tae tai tam tao tar tat tba tbb tbd tbe tbi tbm tbo tbr tbt tda tdb tdd tde tdi tdm tdo tdr tdt te- tea teb ted tee tei tem teo ter tet tia tib tid tie tii tim tio tir tit tma tmb tmd tme tmi tmm tmo tmr tmt to- toa tob tod toe toi tom too tor tot tra trb trd tre tri trm tro trr trt tta ttb ttd tte tti ttm tto ttr ttt