a-a a-b a-i a-t aaa aab aae aaf aai aan aao aat ab- aba abb abe abf abi abn abo abt aea aeb aee aef aei aen aeo aet af- afa afb afe aff afi afn afo aft ai- aia aib aie aif aii ain aio ait an- ana anb ane anf ani ann ano ant aoa aob aoe aof aoi aon aoo aot at- ata atb ate atf ati atn ato att baa bab bae baf bai ban bao bat bba bbb bbe bbf bbi bbn bbo bbt be- bea beb bee bef bei ben beo bet bfa bfb bfe bff bfi bfn bfo bft bi- bia bib bie bif bii bin bio bit bna bnb bne bnf bni bnn bno bnt boa bob boe bof boi bon boo bot bta btb bte btf bti btn bto btt eaa eab eae eaf eai ean eao eat eba ebb ebe ebf ebi ebn ebo ebt eea eeb eee eef een eeo eet ef- efa efb efe eff efi efo eft eia eib eie eif eii ein eio eit en- ena enb ene enf eni enn eno ent eo- eoa eob eoe eof eoi eon eoo eot eta etb ete etf eti etn eto ett faa fab fae faf fai fan fao fat fba fbb fbe fbf fbi fbn fbo fbt fea feb fee fef fei fen feo fet ffa ffe fff ffi ffn ffo fft fia fib fie fif fii fin fit fna fnb fne fnf fni fnn fnt foa fob foe fof foi fon foo fot fta ftb fte ftf fti ftn fto ftt i-f ia- iaa iab iae iaf iai ian iao iat iba ibb ibe ibf ibi ibn ibo ibt ie- iea iee ief iei ien iet ifa ifb ife iff ifi ifn ifo ift iia iib iie iif iii iin iio iit in- ina inb ine inf ini inn ino int io- ioa iob ioe iof ioi ion ioo iot ita itb ite itf iti itn ito itt n-i naa nab nae naf nai nan nao nat nba nbb nbe nbf nbi nbn nbo nbt ne- nea neb nee nef nei nen neo net nfa nfb nfe nff nfi nfn nfo nft nia nib nie nif nii nin nio nit nna nnb nne nnf nni nnn nno nnt no- noa nob noe nof noi non noo not nta ntb nte ntf nti ntn nto ntt o-i oaa oab oae oaf oai oan oao oat ob- oba obb obe obf obi obn obo obt oea oeb oee oef oei oen oeo oet of- ofa ofb ofe off ofi ofn ofo oft oia oib oie oif oii oin oio oit on- ona onb one onf oni onn ono ont oo- ooa oob oof ooi oon ooo oot ot- ota otb ote otf oti otn oto ott taa tab tae taf tai tan tao tat tba tbb tbe tbf tbi tbn tbo tbt te- tea teb tee tef tei ten teo tet tfa tfb tfe tff tfi tfn tfo tft tia tib tie tif tii tin tio tit tna tnb tne tnf tni tnn tno tnt to- toa tob toe tof toi ton too tot tta ttb tte ttf tti ttn tto ttt