-al a-a a-b a-c aaa aab aac aad aal aan aar ab- aba abb abc abd abl abn abr ac- aca acb acc acd acl acn acr ad- ada adb adc add adl adn adr al- ala alb alc ald all aln alr an- ana anb anc and anl ann anr ar- ara arb arc ard arl arn arr baa bab bac bad bal ban bar bba bbb bbc bbd bbl bbn bbr bca bcb bcc bcd bcl bcn bcr bda bdb bdc bdd bdl bdr bla blb blc bld bll bln blr bna bnb bnc bnd bnl bnn bnr bra brb brd brl brn brr c-- caa cab cac cad cal can car cba cbb cbc cbd cbl cbn cbr cca ccb ccc ccd ccl ccn ccr cda cdb cdc cdd cdl cdn cdr cl- cla clb clc cld cll cln clr cn- cna cnb cnc cnd cnl cnn cnr cra crb crc crd crl crn crr daa dab dac dad dal dan dar dba dbb dbc dbd dbl dbn dbr dca dcb dcc dcd dcl dcn dcr dda ddb ddc ddd ddl ddn ddr dl- dla dlb dlc dld dll dlr dna dnb dnc dnd dnl dnn dnr dra drb drc drd drl drn drr la- laa lab lac lad lal lan lar lba lbb lbc lbd lbl lbr lca lcb lcc lcd lcl lcn lcr lda ldb ldc ldd ldl ldn ldr lla llb llc lld lll lln llr lna lnb lnc lnd lnl lnn lnr lra lrb lrc lrd lrn lrr naa nab nac nad nal nan nar nba nbb nbc nbd nbl nbn nbr nca ncb ncc ncd ncl ncn ncr nda ndb ndc ndd ndl ndn ndr nla nlb nlc nld nll nln nlr nna nnb nnc nnl nnn nra nrb nrc nrd nrl nrn nrr ra- raa rab rac rad ral ran rar rba rbb rbc rbd rbl rbn rbr rca rcb rcc rcd rcl rcn rcr rda rdb rdc rdd rdl rdn rdr rla rlc rld rll rln rlr rna rnb rnc rnd rnn rnr rra rrb rrc rrd rrl rrn rrr