-er a-a a-b a-i aaa aab aad aae aag aai aam aao aar ab- aba abb abd abe abg abi abm abo abr ad- ada adb add ade adg adi adm ado adr aea aeb aed aee aeg aei aem aeo aer ag- aga agb agd age agg agi agm ago agr ai- aia aib aid aie aig aii aim aio air ama amb amd ame amg ami amm amo amr aoa aob aod aoe aog aoi aom aoo aor ar- ara arb ard are arg ari arm aro arr baa bab bad bae bag bai bam bao bar bba bbb bbd bbe bbg bbi bbm bbo bbr bda bdb bdd bde bdg bdi bdm bdo bdr be- bea beb bed bee beg bei bem beo ber bga bgb bgd bge bgg bgi bgm bgo bgr bi- bia bib bid bie big bii bim bio bir bma bmb bmd bme bmg bmi bmm bmo bmr boa bob bod boe bog boi bom boo bor bra brb brd bre brg bri brm bro brr daa dab dad dae dag dai dam dao dar dba dbb dbd dbe dbg dbi dbm dbo dbr dda ddb ddd dde ddg ddi ddm ddo ddr de- dea deb ded dee deg dei dem deo der dga dgd dge dgg dgi dgm dgr di- dia dib did die dig dii dim dio dir dma dmb dmd dme dmg dmi dmm dmo dmr doa dob dod doe dog doi dom doo dor dra drb drd dre drg dri drm dro drr eaa eab ead eae eag eai eam eao ear eba ebb ebd ebe ebg ebi ebm ebo ebr ed- eda edb edd ede edg edi edm edo edr eea eeb eed eee eeg eem eeo eer ega egb egd ege egg egi egm ego egr eia eib eid eie eig eii eim eio eir em- ema emb emd eme emg emi emm emo emr eo- eoa eob eod eoe eog eoi eom eoo eor era erb erd ere erg eri erm ero err g-d gaa gab gad gae gag gai gam gao gar gba gbd gbe gbg gbi gbm gbo gbr gda gdb gdd gde gdi gdm gdo gdr ge- gea geb ged gee geg gei gem geo ger gga ggb ggd ggg ggi ggm ggo ggr gia gib gid gie gig gii gim gio gir gma gmb gmd gme gmg gmi gmm gmo gmr goa gob god goe gog goi gom goo gor gra grb grd gre grg gri grm gro grr i-d ia- iaa iab iad iae iag iai iam iao iar iba ibb ibd ibe ibg ibi ibm ibo ibr ida idb idd ide idg idi idm ido idr ie- iea ied iee ieg iei iem ier iga igb igd ige igg igi igm igo igr iia iib iid iie iii iim iio iir im- ima imb imd ime img imi imm imo io- ioa iob iod ioe iog ioi iom ioo ior ir- ira irb ird ire irg iri irm iro irr m-o m-r maa mab mad mae mag mai mam mao mar mba mbb mbd mbe mbg mbi mbm mbo mbr mda mdb mdd mde mdg mdi mdm mdo mdr mea meb med mee meg mei mem meo mer mga mgb mgd mge mgi mgm mgo mgr mi- mia mib mid mie mig mii mim mio mir mma mmb mmd mme mmg mmi mmm mmo mmr moa mob mod moe mog moi mom moo mor mra mrb mrd mre mrg mri mrm mro mrr o-i oaa oab oad oae oag oai oam oao oar ob- oba obb obd obe obg obi obm obo obr oda odb odd ode odg odi odm odo odr oea oeb oed oee oeg oei oem oeo oer oga ogd oge ogg ogi ogo oia oib oid oie oii oim oio oir om- oma omb omd ome omg omi omm omo omr oo- ooa oob ood oog ooi oom ooo oor or- ora orb ord ore org ori orm oro orr ra- raa rab rad rae rag rai ram rao rar rba rbb rbd rbe rbg rbi rbm rbo rbr rda rdb rdd rde rdg rdi rdm rdo rdr re- rea reb red ree reg rei rem reo rer rga rgb rgd rge rgg rgi rgo rgr ria rib rid rie rig rii rim rio rir rma rmb rmd rme rmg rmi rmm rmo rmr roa rob rod roe rog roi rom roo ror rra rrb rrd rrg rri rrm rrr