-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aao aap aar aas aat ab- aba abb abc abe abg abi abo abp abr abs abt ac- aca acb acc ace acg aci aco acp acr acs act aea aeb aec aee aeg aei aeo aep aer aes aet ag- aga agb agc age agg agi ago agp agr ags agt ai- aia aib aic aie aig aii aio aip air ais ait aoa aob aoc aoe aog aoi aoo aop aor aos aot ap- apa apb apc ape apg api apo app apr aps apt ar- ara arb arc are arg ari aro arp arr ars art as- asa asb asc ase asg asi aso asp asr ass ast at- ata atb atc ate atg ati ato atp atr ats att b-p baa bab bac bae bag bai bao bap bar bas bat bba bbb bbc bbe bbg bbi bbo bbp bbr bbs bbt bca bcb bcc bce bcg bci bco bcp bcr bcs bct be- bea beb bec bee beg bei beo bep ber bes bet bga bgb bgc bge bgg bgi bgo bgp bgr bgs bgt bi- bia bib bic bie big bii bio bip bir bis bit boa bob boc boe bog boi boo bop bor bos bot bpa bpb bpc bpe bpg bpi bpo bpp bpr bps bpt bra brb bre brg bri bro brp brr brs brt bsa bsb bsc bse bsg bsi bso bsp bsr bss bst bta btb btc bte btg bti bto btp btr bts btt c-- caa cab cac cae cag cai cao cap car cas cat cba cbb cbc cbe cbg cbi cbo cbp cbr cbs cbt cca ccb ccc cce ccg cci cco ccp ccr ccs cct ce- cea ceb cec cee ceg cei ceo cep cer ces cet cga cgb cgc cge cgg cgi cgo cgp cgr cgs cgt ci- cia cib cic cie cig cii cio cip cir cis cit co- coa cob coc coe cog coi coo cop cor cos cot cpa cpb cpc cpe cpg cpi cpo cpp cpr cps cpt cra crb crc cre crg cri cro crp crr crs crt csa csb csc cse csg csi cso csp csr css cst cta ctb ctc cte ctg cti cto ctp ctr cts ctt eaa eab eac eae eag eai eao eap ear eas eat eba ebb ebc ebe ebg ebi ebo ebp ebr ebs ebt ec- eca ecb ecc ece ecg eci eco ecr ecs ect eea eeb eec eee eeg eeo eep eer ees eet ega egb egc ege egg egi ego egp egr egs egt eia eib eic eie eig eii eio eip eir eis eit eo- eoa eob eoc eoe eog eoi eoo eop eor eos eot ep- epa epb epc epe epg epi epo epp epr eps ept era erb erc ere erg eri ero erp err ers ert es- esa esb esc ese esg esi eso esp esr ess est eta etb etc ete etg eti eto etp etr ets ett g-p gaa gab gac gae gag gai gao gap gar gas gat gba gbc gbe gbg gbi gbo gbp gbr gbs gbt gca gcb gcc gce gcg gci gco gcp gcr gcs gct ge- gea geb gec gee geg gei geo gep ger ges get gga ggb ggc ggg ggi ggo ggp ggr ggs ggt gia gib gic gie gig gii gio gip gir gis git goa gob goc goe gog goi goo gop gor gos got gpa gpb gpc gpe gpg gpi gpo gpp gpr gps gpt gra grb grc gre grg gri gro grp grr grs grt gsa gsb gsc gse gsg gsi gso gsp gsr gss gst gta gtb gtc gte gtg gti gto gtp gtr gts gtt ia- iaa iab iac iae iag iai iao iap iar ias iat iba ibb ibc ibe ibg ibi ibo ibp ibr ibs ibt ica icb icc ice icg ici ico icp icr ics ict ie- iea iec iee ieg iei iep ier ies iet iga igb igc ige igg igi igo igp igr igs igt iia iib iic iie iii iio iip iir iis iit io- ioa iob ioc ioe iog ioi ioo iop ior ios iot ipa ipb ipc ipe ipg ipi ipo ipp ipr ips ipt ir- ira irb irc ire irg iri iro irp irr irs irt is- isa isb isc ise isg isi iso isp isr iss ist ita itb itc ite itg iti ito itp its itt o-i oaa oab oac oae oag oai oao oap oar oas oat ob- oba obb obc obe obg obi obo obp obr obs obt oc- oca ocb occ ocg oci oco ocp ocr ocs oct oea oeb oec oee oeg oei oeo oep oer oes oet oga ogc oge ogg ogi ogo ogp ogs ogt oia oib oic oie oii oio oip oir ois oit oo- ooa oob ooc oog ooi ooo oop oor oos oot op- opa opb opc ope opg opi opo opp opr ops opt or- ora orb orc ore org ori oro orp orr ors ort os- osa osb osc ose osg osi oso osp osr oss ost ot- ota otb otc ote otg oti oto otp otr ots ott p-p paa pab pac pae pag pai pao pap par pas pat pba pbb pbc pbe pbg pbi pbo pbp pbr pbs pbt pca pcb pcc pce pcg pci pco pcp pcr pcs pct pea peb pec pee peg pei peo pep per pes pet pga pgb pgc pge pgg pgi pgo pgp pgr pgs pgt pia pib pic pie pig pii pio pip pir pis pit poa pob poc poe pog poi poo pop por pos pot ppa ppb ppc ppe ppg ppi ppo ppp ppr pps ppt pra prb prc pre prg pri pro prp prr prs prt ps- psa psb psc pse psg psi pso psp psr pss pst pt- pta ptb ptc pte ptg pti pto ptp ptr pts ptt ra- raa