-er a-a a-b a-i aaa aab aae aaf aai aam aan aao aar ab- aba abb abe abf abi abm abn abo abr aea aeb aee aef aei aem aen aeo aer af- afa afb afe aff afi afm afn afo afr ai- aia aib aie aif aii aim ain aio air ama amb ame amf ami amm amn amo amr an- ana anb ane anf ani anm ann ano anr aoa aob aoe aof aoi aom aon aoo aor ar- ara arb are arf ari arm arn aro arr baa bab bae baf bai bam ban bao bar bba bbb bbe bbf bbi bbm bbn bbo bbr be- bea beb bee bef bei bem ben beo ber bfa bfb bfe bff bfi bfm bfn bfo bfr bi- bia bib bie bif bii bim bin bio bir bma bmb bme bmf bmi bmm bmn bmo bmr bna bnb bne bnf bni bnn bno bnr boa bob boe bof boi bom bon boo bor bra brb bre brf bri brm brn bro brr eaa eab eae eaf eai eam ean eao ear eba ebb ebe ebf ebi ebm ebn ebo ebr eea eeb eee eef eem een eeo eer ef- efa efb efe eff efi efm efo efr eia eib eie eif eii eim ein eio eir em- ema emb eme emf emi emm emn emo emr en- ena enb ene enf eni enm enn eno enr eo- eoa eob eoe eof eoi eom eon eoo eor era erb ere erf eri erm ern ero err faa fab fae faf fai fam fan fao far fba fbb fbe fbf fbi fbm fbn fbo fbr fea feb fee fef fei fem fen feo fer ffa ffe fff ffi ffm ffn ffo ffr fia fib fie fif fii fim fin fir fma fmb fme fmf fmi fmm fmn fmo fmr fna fnb fne fnf fni fnm fnn fnr foa fob foe fof foi fom fon foo for fra frb fre frf fri frm frn fro frr i-f ia- iaa iab iae iaf iai iam ian iao iar iba ibb ibe ibf ibi ibm ibn ibo ibr ie- iea iee ief iei iem ien ier ifa ifb ife iff ifi ifm ifn ifo ifr iia iib iie iif iii iim iin iio iir im- ima imb ime imf imi imm imn imo in- ina inb ine inf ini inm inn ino inr io- ioa iob ioe iof ioi iom ion ioo ior ir- ira irb ire irf iri irm irn iro irr m-f m-o m-r maa mab mae maf mai mam man mao mar mba mbb mbe mbf mbi mbm mbo mbr mea meb mee mef mei mem men meo mer mfa mfb mfe mff mfi mfm mfn mfo mfr mi- mia mib mie mif mii mim min mio mir mma mmb mme mmf mmi mmm mmn mmo mmr mna mnb mne mnf mni mnm mnn mno mnr moa mob moe mof moi mom mon moo mor mra mrb mre mrf mri mrm mrn mro mrr n-i naa nab nae naf nai nam nan nao nar nba nbb nbe nbf nbi nbm nbn nbo nbr ne- nea neb nee nef nei nem nen neo ner nfa nfb nfe nff nfi nfn nfo nfr nia nib nie nif nii nim nin nio nir nma nmb nme nmi nmm nmn nmo nmr nna nnb nne nnf nni nnm nnn nno no- noa nob noe nof noi nom non noo nor nra nrb nre nrf nri nrm nrn nro nrr o-i oaa oab oae oaf oai oam oan oao oar ob- oba obb obe obf obi obm obn obo obr oea oeb oee oef oei oem oen oeo oer of- ofa ofb ofe off ofi ofm ofn ofo ofr oia oib oie oif oii oim oin oio oir om- oma omb ome omf omi omm omn omo omr on- ona onb one onf oni onn ono onr oo- ooa oob oof ooi oom oon ooo oor or- ora orb ore orf ori orm orn oro orr ra- raa rab rae raf rai ram ran rao rar rba rbb rbe rbf rbi rbm rbn rbo rbr re- rea reb ree ref rei rem ren reo rer rfa rfb rfe rff rfi rfm rfn rfo rfr ria rib rie rif rii rim rin rio rir rma rmb rme rmf rmi rmm rmn rmo rmr rna rnb rni rnm rnn rno rnr roa rob roe rof roi rom ron roo ror rra rrb rrf rri rrm rrn rrr