-al a-a a-b aaa aab aad aal aan aax ab- aba abb abd abl abn abx ad- ada adb add adl adn adx al- ala alb ald all aln alx an- ana anb and anl ann anx ax- axa axl axn axx baa bab bad bal ban bax bba bbb bbd bbl bbn bbx bda bdb bdd bdl bdx bla blb bld bll bln blx bna bnb bnd bnl bnn bnx bxb bxd bxl bxn bxx daa dab dad dal dan dax dba dbb dbd dbl dbn dbx dda ddb ddd ddl ddn ddx dl- dla dlb dld dll dlx dna dnb dnd dnl dnn dxd dxl dxn dxx la- laa lab lad lal lan lax lba lbb lbd lbl lbx lda ldb ldd ldl ldn lla llb lld lll lln lna lnb lnd lnl lnn lxd lxx naa nab nad nal nan nax nba nbb nbd nbl nbn nbx nda ndb ndd ndl ndn nla nlb nld nll nln nlx nna nnb nnl nnn nxd nxl xaa xad xal xan xbl xbx xda xdb xla xlb xld xna xxl xxx