-al a-a a-b aaa aab aad aal aan aar ab- aba abb abd abl abn abr ad- ada adb add adl adn adr al- ala alb ald all aln alr an- ana anb and anl ann anr ar- ara arb ard arl arn arr baa bab bad bal ban bar bba bbb bbd bbl bbn bbr bda bdb bdd bdl bdr bla blb bld bll bln blr bna bnb bnd bnl bnn bnr bra brb brd brl brn brr daa dab dad dal dan dar dba dbb dbd dbl dbn dbr dda ddb ddd ddl ddn ddr dl- dla dlb dld dll dlr dna dnb dnd dnl dnn dnr dra drb drd drl drn drr la- laa lab lad lal lan lar lba lbb lbd lbl lbr lda ldb ldd ldl ldn ldr lla llb lld lll lln llr lna lnb lnd lnl lnn lnr lra lrb lrd lrn lrr naa nab nad nal nan nar nba nbb nbd nbl nbn nbr nda ndb ndd ndl ndn ndr nla nlb nld nll nln nlr nna nnb nnl nnn nra nrb nrd nrl nrn nrr ra- raa rab rad ral ran rar rba rbb rbd rbl rbn rbr rda rdb rdd rdl rdn rdr rla rld rll rln rlr rna rnb rnd rnn rnr rra rrb rrd rrl rrn rrr