-er a-a a-b a-i aaa aab aad aae aaf aai aak aan aao aap aar ab- aba abb abd abe abf abi abk abn abo abp abr ad- ada adb add ade adf adi adk adn ado adp adr aea aeb aed aee aef aei aek aen aeo aep aer af- afa afb afd afe aff afi afk afn afo afp afr ai- aia aib aid aie aif aii aik ain aio aip air aka akb akd ake aki akk akn ako akp akr an- ana anb and ane anf ani ank ann ano anp anr aoa aob aod aoe aof aoi aok aon aoo aop aor ap- apa apb apd ape apf api apk apn apo app apr ar- ara arb ard are arf ari ark arn aro arp arr b-p baa bab bad bae baf bai bak ban bao bap bar bba bbb bbd bbe bbf bbi bbk bbn bbo bbp bbr bda bdb bdd bde bdf bdi bdk bdo bdp bdr be- bea beb bed bee bef bei bek ben beo bep ber bfa bfb bfd bfe bff bfi bfn bfo bfp bfr bi- bia bib bid bie bif bii bik bin bio bip bir bka bkb bke bkf bkk bkn bko bkp bkr bna bnb bnd bne bnf bni bnk bnn bno bnp bnr boa bob bod boe bof boi bok bon boo bop bor bpa bpb bpd bpe bpf bpi bpn bpo bpp bpr bra brb brd bre brf bri brk brn bro brp brr daa dab dad dae daf dai dak dan dao dap dar dba dbb dbd dbe dbf dbi dbk dbn dbo dbp dbr dda ddb ddd dde ddf ddi ddk ddn ddo ddp ddr de- dea deb ded dee def dei dek den deo dep der dfa dfb dfd dfe dff dfi dfk dfn dfo dfp dfr di- dia dib did die dif dii dik din dio dip dir dka dkb dke dki dkk dko dkp dkr dna dnb dnd dne dnf dni dnk dnn dno dnp dnr doa dob dod doe dof doi dok don doo dop dor dpa dpb dpd dpe dpf dpi dpk dpn dpo dpp dpr dra drb drd dre dri drk drn dro drp drr eaa eab ead eae eaf eai eak ean eao eap ear eba ebb ebd ebe ebf ebi ebk ebn ebo ebp ebr ed- eda edb edd ede edf edi edk edn edo edp edr eea eeb eed eee eef eek een eeo eep eer ef- efa efb efd efe eff efi efo efp efr eia eib eid eie eif eii eik ein eio eip eir eka ekb ekd eke ekf eki eko ekp ekr en- ena enb end ene enf eni enk enn eno enp enr eo- eoa eob eod eoe eof eoi eok eon eoo eop eor ep- epa epb epd epe epf epi epn epo epp epr era erb erd ere erf eri erk ern ero erp err faa fab fad fae faf fai fak fan fao fap far fba fbb fbd fbe fbf fbi fbk fbn fbo fbp fbr fda fdb fdd fde fdf fdi fdk fdn fdo fdp fdr fea feb fed fee fef fei fek fen feo fep fer ffa ffd ffe fff ffi ffk ffn ffo ffp ffr fia fib fid fie fif fii fik fin fip fir fka fkb fkf fki fkk fkp fna fnb fnd fne fnf fni fnk fnn fnp fnr foa fob foe fof foi fok fon foo fop for fpa fpb fpd fpe fpi fpk fpn fpo fpp fpr fra frb frd fre frf fri frk frn fro frp frr i-d i-f ia- iaa iab iad iae iaf iai ian iao iap iar iba ibb ibd ibe ibf ibi ibk ibn ibo ibp ibr ida idb idd ide idf idi idk idn ido idp idr ie- iea ied iee ief iei iek ien iep ier ifa ifb ifd ife iff ifi ifn ifo ifp ifr iia iib iid iie iif iii iin iio iip iir ika ikb ike ikf iki ikk iko ikr in- ina inb ind ine inf ini ink inn ino inp inr io- ioa iob iod ioe iof ioi ion ioo iop ior ipa ipb ipd ipe ipf ipi ipn ipo ipp ipr ir- ira irb ird ire irf iri irk irn iro irp irr ka- kaa kab kad kae kaf kai kak kan kao kap kar kba kbb kbd kbe kbf kbi kbk kbn kbo kbp kbr kda kdb kde kdf kdk kdo kdp kdr ke- kea keb ked kee kef kei kek ken keo kep ker kfa kfd kff kfi kfo kia kib kid kie kif kii kik kin kio kip kir kkb kke kki kkk kkn kkp kkr kn- kna knd kne knf kni knk knn kno knp knr koa kob kod koe kof koi kok kon koo kop kor kpa kpd kpe kpf kpi kpk kpn kpo kpp kpr kra krd krf kri krk krn kro krp krr n-i naa nab nad nae naf nai nak nan nao nap nar nba nbb nbd nbe nbf nbi nbk nbn nbo nbp nbr nda ndb ndd nde ndf ndi ndk ndn ndo ndp ndr ne- nea neb ned nee nef nei nek nen neo nep ner nfa nfb nfd nfe nff nfi nfk nfn nfo nfp nfr nia nib nid nie nif nii nik nin nio nip nir nka nke nkf nki nkk nkn nko nkp nkr nna nnb nne nnf nni nnk nnn nno nnp no- noa nob nod noe nof noi nok non noo nop nor npa npb npd npe npf npi npn npo npp npr nra nrb nrd nre nrf nri nrk nrn nro nrp nrr o-i oaa oab oad oae oaf oai oak oan oao oap oar ob- oba obb obd obe obf obi obk obn obo obp obr oda odb odd ode odf odi odn odo odp odr oea oeb oed oee oef oei oen oeo oep oer of- ofa ofb ofd ofe off ofi ofn ofo ofp ofr oia