-er a-a a-b a-t aaa aab aad aae aaf aam aao aar aat ab- aba abb abd abe abf abm abo abr abt ad- ada adb add ade adf adm ado adr adt aea aeb aed aee aef aem aeo aer aet af- afa afb afd afe aff afm afo afr aft ama amb amd ame amf amm amo amr amt aoa aob aod aoe aof aom aoo aor aot ar- ara arb ard are arf arm aro arr art at- ata atb atd ate atf atm ato atr att baa bab bad bae baf bam bao bar bat bba bbb bbd bbe bbf bbm bbo bbr bbt bda bdb bdd bde bdf bdm bdo bdr bdt be- bea beb bed bee bef bem beo ber bet bfa bfb bfd bfe bff bfm bfo bfr bft bma bmb bmd bme bmf bmm bmo bmr bmt boa bob bod boe bof bom boo bor bot bra brb brd bre brf brm bro brr brt bta btb btd bte btf btm bto btr btt daa dab dad dae daf dam dao dar dat dba dbb dbd dbe dbf dbm dbo dbr dbt dda ddb ddd dde ddf ddm ddo ddr ddt de- dea deb ded dee def dem deo der det dfa dfb dfd dfe dff dfm dfo dfr dft dma dmb dmd dme dmf dmm dmo dmr dmt doa dob dod doe dof dom doo dor dot dra drb drd dre drm dro drr drt dta dtb dtd dte dtf dtm dto dtr dtt eaa eab ead eae eaf eam eao ear eat eba ebb ebd ebe ebf ebm ebo ebr ebt ed- eda edb edd ede edf edm edo edr edt eea eeb eed eee eef eem eeo eer eet ef- efa efb efd efe eff efm efo efr eft em- ema emb emd eme emf emm emo emr emt eo- eoa eob eod eoe eof eom eoo eor eot era erb erd ere erf erm ero err ert eta etb etd ete etf etm eto etr ett faa fab fad fae faf fam fao far fat fba fbb fbd fbe fbf fbm fbo fbr fbt fda fdb fdd fde fdf fdm fdo fdr fdt fea feb fed fee fef fem feo fer fet ffa ffd ffe fff ffm ffo ffr fft fma fmb fmd fme fmf fmm fmo fmr fmt foa fob foe fof fom foo for fot fra frb frd fre frf frm fro frr frt fta ftb ftd fte ftf ftm fto ftr ftt m-f m-o m-r maa mab mad mae maf mam mao mar mat mba mbb mbd mbe mbf mbm mbo mbr mbt mda mdb mdd mde mdf mdm mdo mdr mdt mea meb med mee mef mem meo mer met mfa mfb mfd mfe mff mfm mfo mfr mft mma mmb mmd mme mmf mmm mmo mmr mmt moa mob mod moe mof mom moo mor mot mra mrb mrd mre mrf mrm mro mrr mrt mta mtb mtd mte mtf mtm mto mtr mtt oaa oab oad oae oaf oam oao oar oat ob- oba obb obd obe obf obm obo obr obt oda odb odd ode odf odm odo odr odt oea oeb oed oee oef oem oeo oer oet of- ofa ofb ofd ofe off ofm ofo ofr oft om- oma omb omd ome omf omm omo omr omt oo- ooa oob ood oof oom ooo oor oot or- ora orb ord ore orf orm oro orr ort ot- ota otb otd ote otf otm oto otr ott ra- raa rab rad rae raf ram rao rar rat rba rbb rbd rbe rbf rbm rbo rbr rbt rda rdb rdd rde rdf rdm rdo rdr rdt re- rea reb red ree ref rem reo rer ret rfa rfb rfd rfe rff rfm rfo rfr rft rma rmb rmd rme rmf rmm rmo rmr rmt roa rob rod roe rof rom roo ror rot rra rrb rrd rrf rrm rrr rrt rta rtb rtd rte rtf rtm rto rtr rtt taa tab tad tae taf tam tao tar tat tba tbb tbd tbe tbf tbm tbo tbr tbt tda tdb tdd tde tdf tdm tdo tdr tdt te- tea teb ted tee tef tem teo ter tet tfa tfb tfd tfe tff tfm tfo tfr tft tma tmb tmd tme tmf tmm tmo tmr tmt to- toa tob tod toe tof tom too tor tot tra trb trd tre trf trm tro trr trt tta ttb ttd tte ttf ttm tto ttr ttt