-al a-a a-b a-c a-t aaa aab aac aad aae aak aal aan aat ab- aba abb abc abd abe abk abl abn abt ac- aca acb acc acd ace ack acl acn act ad- ada adb adc add ade adk adl adn adt aea aeb aec aed aee aek ael aen aet aka akb akc akd ake akk akl akn al- ala alb alc ald ale alk all aln alt an- ana anb anc and ane ank anl ann ant at- ata atb atc atd ate atl atn att baa bab bac bad bae bak bal ban bat bba bbb bbc bbd bbe bbk bbl bbn bbt bca bcb bcc bcd bce bck bcl bcn bct bda bdb bdc bdd bde bdk bdl bdt be- bea beb bec bed bee bek bel ben bet bka bkb bkc bke bkk bkl bkn bkt bla blb blc bld ble blk bll bln blt bna bnb bnc bnd bne bnk bnl bnn bnt bta btb btc btd bte btk btl btn btt c-- caa cab cac cad cae cak cal can cat cba cbb cbc cbd cbe cbk cbl cbn cbt cca ccb ccc ccd cce cck ccl ccn cct cda cdb cdc cdd cde cdk cdl cdn cdt ce- cea ceb cec ced cee cek cel cen cet cka ckb ckc ckd ckt cl- cla clb clc cld cle clk cll cln clt cn- cna cnb cnc cnd cne cnl cnn cnt cta ctb ctc ctd cte ctk ctl ctn ctt daa dab dac dad dae dak dal dan dat dba dbb dbc dbd dbe dbk dbl dbn dbt dca dcb dcc dcd dce dck dcl dcn dct dda ddb ddc ddd dde ddk ddl ddn ddt de- dea deb dec ded dee dek del den det dka dkb dkc dke dkk dkl dkt dl- dla dlb dlc dld dle dlk dll dlt dna dnb dnc dnd dne dnk dnl dnn dnt dta dtb dtc dtd dte dtk dtl dtn dtt eaa eab eac ead eae eak eal ean eat eba ebb ebc ebd ebe ebk ebl ebn ebt ec- eca ecb ecc ecd ece eck ecl ecn ect ed- eda edb edc edd ede edk edl edn edt eea eeb eec eed eee eek eel een eet eka ekb ekc ekd eke ekl ekt ela elb elc eld ele elk ell eln elt en- ena enb enc end ene enk enl enn ent eta etb etc etd ete etk etl etn ett k-t ka- kaa kab kac kad kae kak kal kan kat kba kbb kbc kbd kbe kbk kbl kbn kca kcb kcc kcd kce kck kcl kcn kct kda kdb kdc kde kdk kdl kdt ke- kea keb kec ked kee kek kel ken ket kkb kkc kke kkk kkl kkn kkt kl- kla klb klc kld klt kn- kna knc knd kne knk knl knn knt kta ktb ktc kte ktk ktl ktn ktt la- laa lab lac lad lae lak lal lan lat lba lbb lbc lbd lbe lbk lbl lbt lca lcb lcc lcd lce lck lcl lcn lct lda ldb ldc ldd lde ldk ldl ldn ldt lea leb lec led lee lek lel len let lka lkb lkl lkt lla llb llc lld lle llk lll lln llt lna lnb lnc lnd lne lnk lnl lnn lnt lta ltb ltc ltd lte ltk ltl ltt naa nab nac nad nae nak nal nan nat nba nbb nbc nbd nbe nbk nbl nbn nbt nca ncb ncc ncd nce nck ncl ncn nct nda ndb ndc ndd nde ndk ndl ndn ndt ne- nea neb nec ned nee nek nel nen net nka nkc nke nkk nkn nkt nla nlb nlc nld nle nlk nll nln nlt nna nnb nnc nne nnk nnl nnn nnt nta ntb ntc ntd nte ntk ntn ntt taa tab tac tad tae tak tal tan tat tba tbb tbc tbd tbe tbk tbl tbn tbt tca tcb tcc tcd tce tck tcl tcn tct tda tdb tdc tdd tde tdk tdl tdn tdt te- tea teb tec ted tee tek tel ten tet tka tkb tkc tke tkk tkl tkt tla tlc tld tle tlk tll tln tlt tna tnb tnc tnd tne tnk tnl tnn tnt tta ttb ttc ttd tte ttk ttl ttn ttt