-ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aak aan aao aat ab- aba abb abc abd abe abi abk abn abo abt ac- aca acb acc acd ace aci ack acn aco act ad- ada adb adc add ade adi adk adn ado adt aea aeb aec aed aee aei aek aen aeo aet ai- aia aib aic aid aie aii aik ain aio ait aka akb akc akd ake aki akk akn ako an- ana anb anc and ane ani ank ann ano ant aoa aob aoc aod aoe aoi aok aon aoo aot at- ata atb atc atd ate ati atn ato att baa bab bac bad bae bai bak ban bao bat bba bbb bbc bbd bbe bbi bbk bbn bbo bbt bca bcb bcc bcd bce bci bck bcn bco bct bda bdb bdc bdd bde bdi bdk bdo bdt be- bea beb bec bed bee bei bek ben beo bet bi- bia bib bic bid bie bii bik bin bio bit bka bkb bkc bke bkk bkn bko bkt bna bnb bnc bnd bne bni bnk bnn bno bnt boa bob boc bod boe boi bok bon boo bot bta btb btc btd bte bti btk btn bto btt c-- caa cab cac cad cae cai cak can cao cat cba cbb cbc cbd cbe cbi cbk cbn cbo cbt cca ccb ccc ccd cce cci cck ccn cco cct cda cdb cdc cdd cde cdi cdk cdn cdo cdt ce- cea ceb cec ced cee cei cek cen ceo cet ci- cia cib cic cid cie cii cik cin cio cit cka ckb ckc ckd cki cko ckt cn- cna cnb cnc cnd cne cni cnn cno cnt co- coa cob coc cod coe coi cok con coo cot cta ctb ctc ctd cte cti ctk ctn cto ctt daa dab dac dad dae dai dak dan dao dat dba dbb dbc dbd dbe dbi dbk dbn dbo dbt dca dcb dcc dcd dce dci dck dcn dco dct dda ddb ddc ddd dde ddi ddk ddn ddo ddt de- dea deb dec ded dee dei dek den deo det di- dia dib dic did die dii dik din dio dit dka dkb dkc dke dki dkk dko dkt dna dnb dnc dnd dne dni dnk dnn dno dnt doa dob doc dod doe doi dok don doo dot dta dtb dtc dtd dte dti dtk dtn dto dtt eaa eab eac ead eae eai eak ean eao eat eba ebb ebc ebd ebe ebi ebk ebn ebo ebt ec- eca ecb ecc ecd ece eci eck ecn eco ect ed- eda edb edc edd ede edi edk edn edo edt eea eeb eec eed eee eek een eeo eet eia eib eic eid eie eii eik ein eio eit eka ekb ekc ekd eke eki eko ekt en- ena enb enc end ene eni enk enn eno ent eo- eoa eob eoc eod eoe eoi eok eon eoo eot eta etb etc etd ete eti etk etn eto ett i-d ia- iaa iab iac iad iae iai ian iao iat iba ibb ibc ibd ibe ibi ibk ibn ibo ibt ica icb icc icd ice ici ick icn ico ict ida idb idc idd ide idi idk idn ido idt ie- iea iec ied iee iei iek ien iet iia iib iic iid iie iii iin iio iit ika ikb ikc ike iki ikk iko ikt in- ina inb inc ind ine ini ink inn ino int io- ioa iob ioc iod ioe ioi ion ioo iot ita itb itc itd ite iti itk itn ito itt k-t ka- kaa kab kac kad kae kai kak kan kao kat kba kbb kbc kbd kbe kbi kbk kbn kbo kca kcb kcc kcd kce kci kck kcn kct kda kdb kdc kde kdk kdo kdt ke- kea keb kec ked kee kei kek ken keo ket kia kib kic kid kie kii kik kin kio kit kkb kkc kke kki kkk kkn kkt kn- kna knc knd kne kni knk knn kno knt koa kob koc kod koe koi kok kon koo kot kta ktb ktc kte ktk ktn kto ktt n-i naa nab nac nad nae nai nak nan nao nat nba nbb nbc nbd nbe nbi nbk nbn nbo nbt nca ncb ncc ncd nce nci nck ncn nco nct nda ndb ndc ndd nde ndi ndk ndn ndo ndt ne- nea neb nec ned nee nei nek nen neo net nia nib nic nid nie nii nik nin nio nit nka nkc nke nki nkk nkn nko nkt nna nnb nnc nne nni nnk nnn nno nnt no- noa nob noc nod noe noi nok non noo not nta ntb ntc ntd nte nti ntk ntn nto ntt o-i oaa oab oac oad oae oai oak oan oao oat ob- oba obb obc obd obe obi obk obn obo obt oc- oca ocb occ ocd oci ock ocn oco oct oda odb odc odd ode odi odn odo odt oea oeb oec oed oee oei oen oeo oet oia oib oic oid oie oii oik oin oio oit oka okb okc okd oke oki okk oko on- ona onb onc ond one oni onk onn ono ont oo- ooa oob ooc ood ooi ook oon ooo oot ot- ota otb otc otd ote oti otk otn oto ott taa tab tac tad tae tai tak tan tao tat tba tbb tbc tbd tbe tbi tbk tbn tbo tbt tca tcb tcc tcd tce tci tck tcn tco tct tda tdb tdc tdd tde tdi tdk tdn tdo tdt te- tea teb tec ted tee tei tek ten teo tet tia tib tic tid tie tii tik tin tio tit tka tkb tkc tke tkk tko tkt tna tnb tnc tnd tne tni tnk tnn tno tnt to- toa tob toc tod toe toi tok ton too tot tta ttb ttc ttd tte tti ttk ttn tto