-al a-a a-b a-c a-t aaa aab aac aad aak aal aan aat ab- aba abb abc abd abk abl abn abt ac- aca acb acc acd ack acl acn act ad- ada adb adc add adk adl adn adt aka akb akc akd akk akl akn al- ala alb alc ald alk all aln alt an- ana anb anc and ank anl ann ant at- ata atb atc atd atl atn att baa bab bac bad bak bal ban bat bba bbb bbc bbd bbk bbl bbn bbt bca bcb bcc bcd bck bcl bcn bct bda bdb bdc bdd bdk bdl bdt bka bkb bkc bkk bkl bkn bkt bla blb blc bld blk bll bln blt bna bnb bnc bnd bnk bnl bnn bnt bta btb btc btd btk btl btn btt c-- caa cab cac cad cak cal can cat cba cbb cbc cbd cbk cbl cbn cbt cca ccb ccc ccd cck ccl ccn cct cda cdb cdc cdd cdk cdl cdn cdt cka ckb ckc ckd ckt cl- cla clb clc cld clk cll cln clt cn- cna cnb cnc cnd cnl cnn cnt cta ctb ctc ctd ctk ctl ctn ctt daa dab dac dad dak dal dan dat dba dbb dbc dbd dbk dbl dbn dbt dca dcb dcc dcd dck dcl dcn dct dda ddb ddc ddd ddk ddl ddn ddt dka dkb dkc dkk dkl dkt dl- dla dlb dlc dld dlk dll dlt dna dnb dnc dnd dnk dnl dnn dnt dta dtb dtc dtd dtk dtl dtn dtt k-t ka- kaa kab kac kad kak kal kan kat kba kbb kbc kbd kbk kbl kbn kca kcb kcc kcd kck kcl kcn kct kda kdb kdc kdk kdl kdt kkb kkc kkk kkl kkn kkt kl- kla klb klc kld klt kn- kna knc knd knk knl knn knt kta ktb ktc ktk ktl ktn ktt la- laa lab lac lad lak lal lan lat lba lbb lbc lbd lbk lbl lbt lca lcb lcc lcd lck lcl lcn lct lda ldb ldc ldd ldk ldl ldn ldt lka lkb lkl lkt lla llb llc lld llk lll lln llt lna lnb lnc lnd lnk lnl lnn lnt lta ltb ltc ltd ltk ltl ltt naa nab nac nad nak nal nan nat nba nbb nbc nbd nbk nbl nbn nbt nca ncb ncc ncd nck ncl ncn nct nda ndb ndc ndd ndk ndl ndn ndt nka nkc nkk nkn nkt nla nlb nlc nld nlk nll nln nlt nna nnb nnc nnk nnl nnn nnt nta ntb ntc ntd ntk ntn ntt taa tab tac tad tak tal tan tat tba tbb tbc tbd tbk tbl tbn tbt tca tcb tcc tcd tck tcl tcn tct tda tdb tdc tdd tdk tdl tdn tdt tka tkb tkc tkk tkl tkt tla tlc tld tlk tll tln tlt tna tnb tnc tnd tnk tnl tnn tnt tta ttb ttc ttd ttk ttl ttn ttt