-er a-a a-b a-i a-t aaa aab aad aae aaf aai aan aar aat ab- aba abb abd abe abf abi abn abr abt ad- ada adb add ade adf adi adn adr adt aea aeb aed aee aef aei aen aer aet af- afa afb afd afe aff afi afn afr aft ai- aia aib aid aie aif aii ain air ait an- ana anb and ane anf ani ann anr ant ar- ara arb ard are arf ari arn arr art at- ata atb atd ate atf ati atn atr att baa bab bad bae baf bai ban bar bat bba bbb bbd bbe bbf bbi bbn bbr bbt bda bdb bdd bde bdf bdi bdr bdt be- bea beb bed bee bef bei ben ber bet bfa bfb bfd bfe bff bfi bfn bfr bft bi- bia bib bid bie bif bii bin bir bit bna bnb bnd bne bnf bni bnn bnr bnt bra brb brd bre brf bri brn brr brt bta btb btd bte btf bti btn btr btt daa dab dad dae daf dai dan dar dat dba dbb dbd dbe dbf dbi dbn dbr dbt dda ddb ddd dde ddf ddi ddn ddr ddt de- dea deb ded dee def dei den der det dfa dfb dfd dfe dff dfi dfn dfr dft di- dia dib did die dif dii din dir dit dna dnb dnd dne dnf dni dnn dnr dnt dra drb drd dre dri drn drr drt dta dtb dtd dte dtf dti dtn dtr dtt eaa eab ead eae eaf eai ean ear eat eba ebb ebd ebe ebf ebi ebn ebr ebt ed- eda edb edd ede edf edi edn edr edt eea eeb eed eee eef een eer eet ef- efa efb efd efe eff efi efr eft eia eib eid eie eif eii ein eir eit en- ena enb end ene enf eni enn enr ent era erb erd ere erf eri ern err ert eta etb etd ete etf eti etn etr ett faa fab fad fae faf fai fan far fat fba fbb fbd fbe fbf fbi fbn fbr fbt fda fdb fdd fde fdf fdi fdn fdr fdt fea feb fed fee fef fei fen fer fet ffa ffd ffe fff ffi ffn ffr fft fia fib fid fie fif fii fin fir fit fna fnb fnd fne fnf fni fnn fnr fnt fra frb frd fre frf fri frn frr frt fta ftb ftd fte ftf fti ftn ftr ftt i-d i-f ia- iaa iab iad iae iaf iai ian iar iat iba ibb ibd ibe ibf ibi ibn ibr ibt ida idb idd ide idf idi idn idr idt ie- iea ied iee ief iei ien ier iet ifa ifb ifd ife iff ifi ifn ifr ift iia iib iid iie iif iii iin iir iit in- ina inb ind ine inf ini inn inr int ir- ira irb ird ire irf iri irn irr irt ita itb itd ite itf iti itn itt n-i naa nab nad nae naf nai nan nar nat nba nbb nbd nbe nbf nbi nbn nbr nbt nda ndb ndd nde ndf ndi ndn ndr ndt ne- nea neb ned nee nef nei nen ner net nfa nfb nfd nfe nff nfi nfn nfr nft nia nib nid nie nif nii nin nir nit nna nnb nne nnf nni nnn nnt nra nrb nrd nre nrf nri nrn nrr nrt nta ntb ntd nte ntf nti ntn ntr ntt ra- raa rab rad rae raf rai ran rar rat rba rbb rbd rbe rbf rbi rbn rbr rbt rda rdb rdd rde rdf rdi rdn rdr rdt re- rea reb red ree ref rei ren rer ret rfa rfb rfd rfe rff rfi rfn rfr rft ria rib rid rie rif rii rin rir rit rna rnb rnd rni rnn rnr rnt rra rrb rrd rrf rri rrn rrr rrt rta rtb rtd rte rtf rti rtn rtr rtt taa tab tad tae taf tai tan tar tat tba tbb tbd tbe tbf tbi tbn tbr tbt tda tdb tdd tde tdf tdi tdn tdr tdt te- tea teb ted tee tef tei ten ter tet tfa tfb tfd tfe tff tfi tfn tfr tft tia tib tid tie tif tii tin tir tit tna tnb tnd tne tnf tni tnn tnr tnt tra trb trd tre trf tri trn trr trt tta ttb ttd tte ttf tti ttn ttr ttt