-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aag aai aan aao aar aat ab- aba abb abc abe abf abg abi abn abo abr abt ac- aca acb acc ace acf acg aci acn aco acr act aea aeb aec aee aef aeg aei aen aeo aer aet af- afa afb afc afe aff afg afi afn afo afr aft ag- aga agb agc age agf agg agi agn ago agr agt ai- aia aib aic aie aif aig aii ain aio air ait an- ana anb anc ane anf ang ani ann ano anr ant aoa aob aoc aoe aof aog aoi aon aoo aor aot ar- ara arb arc are arf arg ari arn aro arr art at- ata atb atc ate atf atg ati atn ato atr att baa bab bac bae baf bag bai ban bao bar bat bba bbb bbc bbe bbf bbg bbi bbn bbo bbr bbt bca bcb bcc bce bcf bcg bci bcn bco bcr bct be- bea beb bec bee bef beg bei ben beo ber bet bfa bfb bfc bfe bff bfg bfi bfn bfo bfr bft bga bgb bgc bge bgf bgg bgi bgn bgo bgr bgt bi- bia bib bic bie bif big bii bin bio bir bit bna bnb bnc bne bnf bng bni bnn bno bnr bnt boa bob boc boe bof bog boi bon boo bor bot bra brb bre brf brg bri brn bro brr brt bta btb btc bte btf btg bti btn bto btr btt c-- caa cab cac cae caf cag cai can cao car cat cba cbb cbc cbe cbf cbg cbi cbn cbo cbr cbt cca ccb ccc cce ccf ccg cci ccn cco ccr cct ce- cea ceb cec cee cef ceg cei cen ceo cer cet cfa cfb cfc cfe cff cfg cfi cfn cfo cfr cft cga cgb cgc cge cgg cgi cgn cgo cgr cgt ci- cia cib cic cie cif cig cii cin cio cir cit cn- cna cnb cnc cne cnf cng cni cnn cno cnr cnt co- coa cob coc coe cof cog coi con coo cor cot cra crb crc cre crf crg cri crn cro crr crt cta ctb ctc cte ctf ctg cti ctn cto ctr ctt eaa eab eac eae eaf eag eai ean eao ear eat eba ebb ebc ebe ebf ebg ebi ebn ebo ebr ebt ec- eca ecb ecc ece ecf ecg eci ecn eco ecr ect eea eeb eec eee eef eeg een eeo eer eet ef- efa efb efc efe eff efg efi efo efr eft ega egb egc ege egf egg egi egn ego egr egt eia eib eic eie eif eig eii ein eio eir eit en- ena enb enc ene enf eng eni enn eno enr ent eo- eoa eob eoc eoe eof eog eoi eon eoo eor eot era erb erc ere erf erg eri ern ero err ert eta etb etc ete etf etg eti etn eto etr ett faa fab fac fae faf fag fai fan fao far fat fba fbb fbc fbe fbf fbg fbi fbn fbo fbr fbt fca fcb fcc fce fcf fcg fci fcn fco fcr fct fea feb fec fee fef feg fei fen feo fer fet ffa ffc ffe fff ffg ffi ffn ffo ffr fft fga fgb fgc fge fgf fgg fgi fgn fgr fgt fia fib fic fie fif fig fii fin fir fit fna fnb fnc fne fnf fng fni fnn fnr fnt foa fob foc foe fof fog foi fon foo for fot fra frb frc fre frf frg fri frn fro frr frt fta ftb ftc fte ftf ftg fti ftn fto ftr ftt gaa gab gac gae gaf gag gai gan gao gar gat gba gbc gbe gbf gbg gbi gbn gbo gbr gbt gca gcb gcc gce gcf gcg gci gcn gco gcr gct ge- gea geb gec gee gef geg gei gen geo ger get gfa gfb gfc gfe gff gfi gfo gfr gft gga ggb ggc ggg ggi ggn ggo ggr ggt gia gib gic gie gif gig gii gin gio gir git gna gnb gnc gne gnf gni gnn gno gnr gnt goa gob goc goe gof gog goi gon goo gor got gra grb grc gre grf grg gri grn gro grr grt gta gtb gtc gte gtf gtg gti gtn gto gtr gtt i-f ia- iaa iab iac iae iaf iag iai ian iao iar iat iba ibb ibc ibe ibf ibg ibi ibn ibo ibr ibt ica icb icc ice icf icg ici icn ico icr ict ie- iea iec iee ief ieg iei ien ier iet ifa ifb ifc ife iff ifg ifi ifn ifo ifr ift iga igb igc ige igf igg igi ign igo igr igt iia iib iic iie iif iii iin iio iir iit in- ina inb inc ine inf ing ini inn ino inr int io- ioa iob ioc ioe iof iog ioi ion ioo ior iot ir- ira irb irc ire irf irg iri irn iro irr irt ita itb itc ite itf itg iti itn ito itt n-i naa nab nac nae naf nag nai nan nao nar nat nba nbb nbc nbe nbf nbg nbi nbn nbo nbr nbt nca ncb ncc nce ncf ncg nci ncn nco ncr nct ne- nea neb nec nee nef neg nei nen neo ner net nfa nfb nfc nfe nff nfi nfn nfo nfr nft nga ngb ngc nge ngf ngg ngi ngn ngo ngt nia nib nic nie nif nig nii nin nio nir nit nna nnb nnc nne nnf nng nni nnn nno nnt no- noa nob noc noe nof nog noi non noo nor not nra nrb nrc nre nrf nrg nri nrn nro nrr nrt nta ntb ntc nte ntf ntg nti ntn nto ntr ntt o-i oaa oab oac oae oaf oag oai oan oao oar oat ob- oba obb obc obe