-al a-a a-b a-c aaa aab aac aal aan aap ab- aba abb abc abl abn abp ac- aca acb acc acl acn acp al- ala alb alc all aln alp an- ana anb anc anl ann anp ap- apa apb apc apl apn app b-p baa bab bac bal ban bap bba bbb bbc bbl bbn bbp bca bcb bcc bcl bcn bcp bla blb blc bll bln blp bna bnb bnc bnl bnn bnp bpa bpb bpc bpl bpn bpp c-- caa cab cac cal can cap cba cbb cbc cbl cbn cbp cca ccb ccc ccl ccn ccp cl- cla clb clc cll cln clp cn- cna cnb cnc cnl cnn cnp cpa cpb cpc cpl cpn cpp l-p la- laa lab lac lal lan lap lba lbb lbc lbl lbp lca lcb lcc lcl lcn lcp lla llb llc lll lln llp lna lnb lnc lnl lnn lnp lpa lpb lpc lpl lpn lpp naa nab nac nal nan nap nba nbb nbc nbl nbn nbp nca ncb ncc ncl ncn ncp nla nlb nlc nll nln nlp nna nnb nnc nnl nnn nnp npa npb npc npl npn npp p-p paa pab pac pal pan pap pba pbb pbc pbl pbn pbp pca pcb pcc pcl pcn pcp pla plb plc pll pln plp pn- pna pnb pnc pnl pnn pnp ppa ppb ppc ppl ppn ppp