-er -ic a-a a-b a-c a-i a-t aaa aab aac aad aae aag aai aao aar aat ab- aba abb abc abd abe abg abi abo abr abt ac- aca acb acc acd ace acg aci aco acr act ad- ada adb adc add ade adg adi ado adr adt aea aeb aec aed aee aeg aei aeo aer aet ag- aga agb agc agd age agg agi ago agr agt ai- aia aib aic aid aie aig aii aio air ait aoa aob aoc aod aoe aog aoi aoo aor aot ar- ara arb arc ard are arg ari aro arr art at- ata atb atc atd ate atg ati ato atr att baa bab bac bad bae bag bai bao bar bat bba bbb bbc bbd bbe bbg bbi bbo bbr bbt bca bcb bcc bcd bce bcg bci bco bcr bct bda bdb bdc bdd bde bdg bdi bdo bdr bdt be- bea beb bec bed bee beg bei beo ber bet bga bgb bgc bgd bge bgg bgi bgo bgr bgt bi- bia bib bic bid bie big bii bio bir bit boa bob boc bod boe bog boi boo bor bot bra brb brd bre brg bri bro brr brt bta btb btc btd bte btg bti bto btr btt c-- caa cab cac cad cae cag cai cao car cat cba cbb cbc cbd cbe cbg cbi cbo cbr cbt cca ccb ccc ccd cce ccg cci cco ccr cct cda cdb cdc cdd cde cdg cdi cdo cdr cdt ce- cea ceb cec ced cee ceg cei ceo cer cet cga cgb cgc cgd cge cgg cgi cgo cgr cgt ci- cia cib cic cid cie cig cii cio cir cit co- coa cob coc cod coe cog coi coo cor cot cra crb crc crd cre crg cri cro crr crt cta ctb ctc ctd cte ctg cti cto ctr ctt daa dab dac dad dae dag dai dao dar dat dba dbb dbc dbd dbe dbg dbi dbo dbr dbt dca dcb dcc dcd dce dcg dci dco dcr dct dda ddb ddc ddd dde ddg ddi ddo ddr ddt de- dea deb dec ded dee deg dei deo der det dga dgc dgd dge dgg dgi dgr dgt di- dia dib dic did die dig dii dio dir dit doa dob doc dod doe dog doi doo dor dot dra drb drc drd dre drg dri dro drr drt dta dtb dtc dtd dte dtg dti dto dtr dtt eaa eab eac ead eae eag eai eao ear eat eba ebb ebc ebd ebe ebg ebi ebo ebr ebt ec- eca ecb ecc ecd ece ecg eci eco ecr ect ed- eda edb edc edd ede edg edi edo edr edt eea eeb eec eed eee eeg eeo eer eet ega egb egc egd ege egg egi ego egr egt eia eib eic eid eie eig eii eio eir eit eo- eoa eob eoc eod eoe eog eoi eoo eor eot era erb erc erd ere erg eri ero err ert eta etb etc etd ete etg eti eto etr ett g-d gaa gab gac gad gae gag gai gao gar gat gba gbc gbd gbe gbg gbi gbo gbr gbt gca gcb gcc gcd gce gcg gci gco gcr gct gda gdb gdc gdd gde gdi gdo gdr gdt ge- gea geb gec ged gee geg gei geo ger get gga ggb ggc ggd ggg ggi ggo ggr ggt gia gib gic gid gie gig gii gio gir git goa gob goc god goe gog goi goo gor got gra grb grc grd gre grg gri gro grr grt gta gtb gtc gtd gte gtg gti gto gtr gtt i-d ia- iaa iab iac iad iae iag iai iao iar iat iba ibb ibc ibd ibe ibg ibi ibo ibr ibt ica icb icc icd ice icg ici ico icr ict ida idb idc idd ide idg idi ido idr idt ie- iea iec ied iee ieg iei ier iet iga igb igc igd ige igg igi igo igr igt iia iib iic iid iie iii iio iir iit io- ioa iob ioc iod ioe iog ioi ioo ior iot ir- ira irb irc ird ire irg iri iro irr irt ita itb itc itd ite itg iti ito itt o-i oaa oab oac oad oae oag oai oao oar oat ob- oba obb obc obd obe obg obi obo obr obt oc- oca ocb occ ocd ocg oci oco ocr oct oda odb odc odd ode odg odi odo odr odt oea oeb oec oed oee oeg oei oeo oer oet oga ogc ogd oge ogg ogi ogo ogt oia oib oic oid oie oii oio oir oit oo- ooa oob ooc ood oog ooi ooo oor oot or- ora orb orc ord ore org ori oro orr ort ot- ota otb otc otd ote otg oti oto otr ott ra- raa rab rac rad rae rag rai rao rar rat rba rbb rbc rbd rbe rbg rbi rbo rbr rbt rca rcb rcc rcd rce rcg rci rco rcr rct rda rdb rdc rdd rde rdg rdi rdo rdr rdt re- rea reb rec red ree reg rei reo rer ret rga rgb rgc rgd rge rgg rgi rgo rgr rgt ria rib ric rid rie rig rii rio rir rit roa rob roc rod roe rog roi roo ror rot rra rrb rrc rrd rrg rri rrr rrt rta rtb rtc rtd rte rtg rti rto rtr rtt taa tab tac tad tae tag tai tao tar tat tba tbb tbc tbd tbe tbg tbi tbo tbr tbt tca tcb tcc tcd tce tcg tci tco tcr tct tda tdb tdc tdd tde tdg tdi tdo tdr tdt te- tea teb tec ted tee teg tei teo ter tet tga tgb tgc tge tgg tgi tgo tgr tgt tia tib tic tid tie tig tii tio tir tit to- toa tob toc tod toe tog toi