-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aan aao aar aat ab- aba abb abc abe abf abi abn abo abr abt ac- aca acb acc ace acf aci acn aco acr act aea aeb aec aee aef aei aen aeo aer aet af- afa afb afc afe aff afi afn afo afr aft ai- aia aib aic aie aif aii ain aio air ait an- ana anb anc ane anf ani ann ano anr ant aoa aob aoc aoe aof aoi aon aoo aor aot ar- ara arb arc are arf ari arn aro arr art at- ata atb atc ate atf ati atn ato atr att baa bab bac bae baf bai ban bao bar bat bba bbb bbc bbe bbf bbi bbn bbo bbr bbt bca bcb bcc bce bcf bci bcn bco bcr bct be- bea beb bec bee bef bei ben beo ber bet bfa bfb bfc bfe bff bfi bfn bfo bfr bft bi- bia bib bic bie bif bii bin bio bir bit bna bnb bnc bne bnf bni bnn bno bnr bnt boa bob boc boe bof boi bon boo bor bot bra brb bre brf bri brn bro brr brt bta btb btc bte btf bti btn bto btr btt c-- caa cab cac cae caf cai can cao car cat cba cbb cbc cbe cbf cbi cbn cbo cbr cbt cca ccb ccc cce ccf cci ccn cco ccr cct ce- cea ceb cec cee cef cei cen ceo cer cet cfa cfb cfc cfe cff cfi cfn cfo cfr cft ci- cia cib cic cie cif cii cin cio cir cit cn- cna cnb cnc cne cnf cni cnn cno cnr cnt co- coa cob coc coe cof coi con coo cor cot cra crb crc cre crf cri crn cro crr crt cta ctb ctc cte ctf cti ctn cto ctr ctt eaa eab eac eae eaf eai ean eao ear eat eba ebb ebc ebe ebf ebi ebn ebo ebr ebt ec- eca ecb ecc ece ecf eci ecn eco ecr ect eea eeb eec eee eef een eeo eer eet ef- efa efb efc efe eff efi efo efr eft eia eib eic eie eif eii ein eio eir eit en- ena enb enc ene enf eni enn eno enr ent eo- eoa eob eoc eoe eof eoi eon eoo eor eot era erb erc ere erf eri ern ero err ert eta etb etc ete etf eti etn eto etr ett faa fab fac fae faf fai fan fao far fat fba fbb fbc fbe fbf fbi fbn fbo fbr fbt fca fcb fcc fce fcf fci fcn fco fcr fct fea feb fec fee fef fei fen feo fer fet ffa ffc ffe fff ffi ffn ffo ffr fft fia fib fic fie fif fii fin fir fit fna fnb fnc fne fnf fni fnn fnr fnt foa fob foc foe fof foi fon foo for fot fra frb frc fre frf fri frn fro frr frt fta ftb ftc fte ftf fti ftn fto ftr ftt i-f ia- iaa iab iac iae iaf iai ian iao iar iat iba ibb ibc ibe ibf ibi ibn ibo ibr ibt ica icb icc ice icf ici icn ico icr ict ie- iea iec iee ief iei ien ier iet ifa ifb ifc ife iff ifi ifn ifo ifr ift iia iib iic iie iif iii iin iio iir iit in- ina inb inc ine inf ini inn ino inr int io- ioa iob ioc ioe iof ioi ion ioo ior iot ir- ira irb irc ire irf iri irn iro irr irt ita itb itc ite itf iti itn ito itt n-i naa nab nac nae naf nai nan nao nar nat nba nbb nbc nbe nbf nbi nbn nbo nbr nbt nca ncb ncc nce ncf nci ncn nco ncr nct ne- nea neb nec nee nef nei nen neo ner net nfa nfb nfc nfe nff nfi nfn nfo nfr nft nia nib nic nie nif nii nin nio nir nit nna nnb nnc nne nnf nni nnn nno nnt no- noa nob noc noe nof noi non noo nor not nra nrb nrc nre nrf nri nrn nro nrr nrt nta ntb ntc nte ntf nti ntn nto ntr ntt o-i oaa oab oac oae oaf oai oan oao oar oat ob- oba obb obc obe obf obi obn obo obr obt oc- oca ocb occ ocf oci ocn oco ocr oct oea oeb oec oee oef oei oen oeo oer oet of- ofa ofb ofc ofe off ofi ofn ofo ofr oft oia oib oic oie oif oii oin oio oir oit on- ona onb onc one onf oni onn ono onr ont oo- ooa oob ooc oof ooi oon ooo oor oot or- ora orb orc ore orf ori orn oro orr ort ot- ota otb otc ote otf oti otn oto otr ott ra- raa rab rac rae raf rai ran rao rar rat rba rbb rbc rbe rbf rbi rbn rbo rbr rbt rca rcb rcc rce rcf rci rcn rco rcr rct re- rea reb rec ree ref rei ren reo rer ret rfa rfb rfc rfe rff rfi rfn rfo rfr rft ria rib ric rie rif rii rin rio rir rit rna rnb rnc rni rnn rno rnr rnt roa rob roc roe rof roi ron roo ror rot rra rrb rrc rrf rri rrn rrr rrt rta rtb rtc rte rtf rti rtn rto rtr rtt taa tab tac tae taf tai tan tao tar tat tba tbb tbc tbe tbf tbi tbn tbo tbr tbt tca tcb tcc tce tcf tci tcn tco tcr tct te- tea teb tec tee tef tei ten teo ter tet tfa tfb tfc tfe tff tfi tfn tfo tfr tft tia tib tic tie tif tii tin tio tir tit tna tnb tnc tne tnf tni tnn tno tnr tnt to-