-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aan aao aar aat ab- aba abb abc abe abg abi abn abo abr abt ac- aca acb acc ace acg aci acn aco acr act aea aeb aec aee aeg aei aen aeo aer aet ag- aga agb agc age agg agi agn ago agr agt ai- aia aib aic aie aig aii ain aio air ait an- ana anb anc ane ang ani ann ano anr ant aoa aob aoc aoe aog aoi aon aoo aor aot ar- ara arb arc are arg ari arn aro arr art at- ata atb atc ate atg ati atn ato atr att baa bab bac bae bag bai ban bao bar bat bba bbb bbc bbe bbg bbi bbn bbo bbr bbt bca bcb bcc bce bcg bci bcn bco bcr bct be- bea beb bec bee beg bei ben beo ber bet bga bgb bgc bge bgg bgi bgn bgo bgr bgt bi- bia bib bic bie big bii bin bio bir bit bna bnb bnc bne bng bni bnn bno bnr bnt boa bob boc boe bog boi bon boo bor bot bra brb bre brg bri brn bro brr brt bta btb btc bte btg bti btn bto btr btt c-- caa cab cac cae cag cai can cao car cat cba cbb cbc cbe cbg cbi cbn cbo cbr cbt cca ccb ccc cce ccg cci ccn cco ccr cct ce- cea ceb cec cee ceg cei cen ceo cer cet cga cgb cgc cge cgg cgi cgn cgo cgr cgt ci- cia cib cic cie cig cii cin cio cir cit cn- cna cnb cnc cne cng cni cnn cno cnr cnt co- coa cob coc coe cog coi con coo cor cot cra crb crc cre crg cri crn cro crr crt cta ctb ctc cte ctg cti ctn cto ctr ctt eaa eab eac eae eag eai ean eao ear eat eba ebb ebc ebe ebg ebi ebn ebo ebr ebt ec- eca ecb ecc ece ecg eci ecn eco ecr ect eea eeb eec eee eeg een eeo eer eet ega egb egc ege egg egi egn ego egr egt eia eib eic eie eig eii ein eio eir eit en- ena enb enc ene eng eni enn eno enr ent eo- eoa eob eoc eoe eog eoi eon eoo eor eot era erb erc ere erg eri ern ero err ert eta etb etc ete etg eti etn eto etr ett gaa gab gac gae gag gai gan gao gar gat gba gbc gbe gbg gbi gbn gbo gbr gbt gca gcb gcc gce gcg gci gcn gco gcr gct ge- gea geb gec gee geg gei gen geo ger get gga ggb ggc ggg ggi ggn ggo ggr ggt gia gib gic gie gig gii gin gio gir git gna gnb gnc gne gni gnn gno gnr gnt goa gob goc goe gog goi gon goo gor got gra grb grc gre grg gri grn gro grr grt gta gtb gtc gte gtg gti gtn gto gtr gtt ia- iaa iab iac iae iag iai ian iao iar iat iba ibb ibc ibe ibg ibi ibn ibo ibr ibt ica icb icc ice icg ici icn ico icr ict ie- iea iec iee ieg iei ien ier iet iga igb igc ige igg igi ign igo igr igt iia iib iic iie iii iin iio iir iit in- ina inb inc ine ing ini inn ino inr int io- ioa iob ioc ioe iog ioi ion ioo ior iot ir- ira irb irc ire irg iri irn iro irr irt ita itb itc ite itg iti itn ito itt n-i naa nab nac nae nag nai nan nao nar nat nba nbb nbc nbe nbg nbi nbn nbo nbr nbt nca ncb ncc nce ncg nci ncn nco ncr nct ne- nea neb nec nee neg nei nen neo ner net nga ngb ngc nge ngg ngi ngn ngo ngt nia nib nic nie nig nii nin nio nir nit nna nnb nnc nne nng nni nnn nno nnt no- noa nob noc noe nog noi non noo nor not nra nrb nrc nre nrg nri nrn nro nrr nrt nta ntb ntc nte ntg nti ntn nto ntr ntt o-i oaa oab oac oae oag oai oan oao oar oat ob- oba obb obc obe obg obi obn obo obr obt oc- oca ocb occ ocg oci ocn oco ocr oct oea oeb oec oee oeg oei oen oeo oer oet oga ogc oge ogg ogi ogn ogo ogt oia oib oic oie oii oin oio oir oit on- ona onb onc one ong oni onn ono onr ont oo- ooa oob ooc oog ooi oon ooo oor oot or- ora orb orc ore org ori orn oro orr ort ot- ota otb otc ote otg oti otn oto otr ott ra- raa rab rac rae rag rai ran rao rar rat rba rbb rbc rbe rbg rbi rbn rbo rbr rbt rca rcb rcc rce rcg rci rcn rco rcr rct re- rea reb rec ree reg rei ren reo rer ret rga rgb rgc rge rgg rgi rgn rgo rgr rgt ria rib ric rie rig rii rin rio rir rit rna rnb rnc rng rni rnn rno rnr rnt roa rob roc roe rog roi ron roo ror rot rra rrb rrc rrg rri rrn rrr rrt rta rtb rtc rte rtg rti rtn rto rtr rtt taa tab tac tae tag tai tan tao tar tat tba tbb tbc tbe tbg tbi tbn tbo tbr tbt tca tcb tcc tce tcg tci tcn tco tcr tct te- tea teb tec tee teg tei ten teo ter tet tga tgb tgc tge tgg tgi tgn tgo tgr tgt tia tib tic tie tig tii tin tio tir tit tna tnb tnc tne tng tni tnn tno tnr tnt to- toa tob toc toe tog