-al a-a a-b a-c aaa aab aac aad aak aal aan ab- aba abb abc abd abk abl abn ac- aca acb acc acd ack acl acn ad- ada adb adc add adk adl adn aka akb akc akd akk akl akn al- ala alb alc ald alk all aln an- ana anb anc and ank anl ann baa bab bac bad bak bal ban bba bbb bbc bbd bbk bbl bbn bca bcb bcc bcd bck bcl bcn bda bdb bdc bdd bdk bdl bka bkb bkc bkk bkl bkn bla blb blc bld blk bll bln bna bnb bnc bnd bnk bnl bnn c-- caa cab cac cad cak cal can cba cbb cbc cbd cbk cbl cbn cca ccb ccc ccd cck ccl ccn cda cdb cdc cdd cdk cdl cdn cka ckb ckc ckd cl- cla clb clc cld clk cll cln cn- cna cnb cnc cnd cnl cnn daa dab dac dad dak dal dan dba dbb dbc dbd dbk dbl dbn dca dcb dcc dcd dck dcl dcn dda ddb ddc ddd ddk ddl ddn dka dkb dkc dkk dkl dl- dla dlb dlc dld dlk dll dna dnb dnc dnd dnk dnl dnn ka- kaa kab kac kad kak kal kan kba kbb kbc kbd kbk kbl kbn kca kcb kcc kcd kck kcl kcn kda kdb kdc kdk kdl kkb kkc kkk kkl kkn kl- kla klb klc kld kn- kna knc knd knk knl knn la- laa lab lac lad lak lal lan lba lbb lbc lbd lbk lbl lca lcb lcc lcd lck lcl lcn lda ldb ldc ldd ldk ldl ldn lka lkb lkl lla llb llc lld llk lll lln lna lnb lnc lnd lnk lnl lnn naa nab nac nad nak nal nan nba nbb nbc nbd nbk nbl nbn nca ncb ncc ncd nck ncl ncn nda ndb ndc ndd ndk ndl ndn nka nkc nkk nkn nla nlb nlc nld nlk nll nln nna nnb nnc nnk nnl nnn