-ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aan aao aat ab- aba abb abc abe abf abi abn abo abt ac- aca acb acc ace acf aci acn aco act aea aeb aec aee aef aei aen aeo aet af- afa afb afc afe aff afi afn afo aft ai- aia aib aic aie aif aii ain aio ait an- ana anb anc ane anf ani ann ano ant aoa aob aoc aoe aof aoi aon aoo aot at- ata atb atc ate atf ati atn ato att baa bab bac bae baf bai ban bao bat bba bbb bbc bbe bbf bbi bbn bbo bbt bca bcb bcc bce bcf bci bcn bco bct be- bea beb bec bee bef bei ben beo bet bfa bfb bfc bfe bff bfi bfn bfo bft bi- bia bib bic bie bif bii bin bio bit bna bnb bnc bne bnf bni bnn bno bnt boa bob boc boe bof boi bon boo bot bta btb btc bte btf bti btn bto btt c-- caa cab cac cae caf cai can cao cat cba cbb cbc cbe cbf cbi cbn cbo cbt cca ccb ccc cce ccf cci ccn cco cct ce- cea ceb cec cee cef cei cen ceo cet cfa cfb cfc cfe cff cfi cfn cfo cft ci- cia cib cic cie cif cii cin cio cit cn- cna cnb cnc cne cnf cni cnn cno cnt co- coa cob coc coe cof coi con coo cot cta ctb ctc cte ctf cti ctn cto ctt eaa eab eac eae eaf eai ean eao eat eba ebb ebc ebe ebf ebi ebn ebo ebt ec- eca ecb ecc ece ecf eci ecn eco ect eea eeb eec eee eef een eeo eet ef- efa efb efc efe eff efi efo eft eia eib eic eie eif eii ein eio eit en- ena enb enc ene enf eni enn eno ent eo- eoa eob eoc eoe eof eoi eon eoo eot eta etb etc ete etf eti etn eto ett faa fab fac fae faf fai fan fao fat fba fbb fbc fbe fbf fbi fbn fbo fbt fca fcb fcc fce fcf fci fcn fco fct fea feb fec fee fef fei fen feo fet ffa ffc ffe fff ffi ffn ffo fft fia fib fic fie fif fii fin fit fna fnb fnc fne fnf fni fnn fnt foa fob foc foe fof foi fon foo fot fta ftb ftc fte ftf fti ftn fto ftt i-f ia- iaa iab iac iae iaf iai ian iao iat iba ibb ibc ibe ibf ibi ibn ibo ibt ica icb icc ice icf ici icn ico ict ie- iea iec iee ief iei ien iet ifa ifb ifc ife iff ifi ifn ifo ift iia iib iic iie iif iii iin iio iit in- ina inb inc ine inf ini inn ino int io- ioa iob ioc ioe iof ioi ion ioo iot ita itb itc ite itf iti itn ito itt n-i naa nab nac nae naf nai nan nao nat nba nbb nbc nbe nbf nbi nbn nbo nbt nca ncb ncc nce ncf nci ncn nco nct ne- nea neb nec nee nef nei nen neo net nfa nfb nfc nfe nff nfi nfn nfo nft nia nib nic nie nif nii nin nio nit nna nnb nnc nne nnf nni nnn nno nnt no- noa nob noc noe nof noi non noo not nta ntb ntc nte ntf nti ntn nto ntt o-i oaa oab oac oae oaf oai oan oao oat ob- oba obb obc obe obf obi obn obo obt oc- oca ocb occ ocf oci ocn oco oct oea oeb oec oee oef oei oen oeo oet of- ofa ofb ofc ofe off ofi ofn ofo oft oia oib oic oie oif oii oin oio oit on- ona onb onc one onf oni onn ono ont oo- ooa oob ooc oof ooi oon ooo oot ot- ota otb otc ote otf oti otn oto ott taa tab tac tae taf tai tan tao tat tba tbb tbc tbe tbf tbi tbn tbo tbt tca tcb tcc tce tcf tci tcn tco tct te- tea teb tec tee tef tei ten teo tet tfa tfb tfc tfe tff tfi tfn tfo tft tia tib tic tie tif tii tin tio tit tna tnb tnc tne tnf tni tnn tno tnt to- toa tob toc toe tof toi ton too tot tta ttb ttc tte ttf tti ttn tto ttt