-al a-a a-b aaa aab aae aal aan aap ab- aba abb abe abl abn abp aea aeb aee ael aen aep al- ala alb ale all aln alp an- ana anb ane anl ann anp ap- apa apb ape apl apn app b-p baa bab bae bal ban bap bba bbb bbe bbl bbn bbp be- bea beb bee bel ben bep bla blb ble bll bln blp bna bnb bne bnl bnn bnp bpa bpb bpe bpl bpn bpp eaa eab eae eal ean eap eba ebb ebe ebl ebn ebp eea eeb eee eel een eep ela elb ele ell eln elp en- ena enb ene enl enn enp ep- epa epb epe epl epn epp l-p la- laa lab lae lal lan lap lba lbb lbe lbl lbp lea leb lee lel len lep lla llb lle lll lln llp lna lnb lne lnl lnn lnp lpa lpb lpe lpl lpn lpp naa nab nae nal nan nap nba nbb nbe nbl nbn nbp ne- nea neb nee nel nen nep nla nlb nle nll nln nlp nna nnb nne nnl nnn nnp npa npb npe npl npn npp p-p paa pab pae pal pan pap pba pbb pbe pbl pbn pbp pea peb pee pel pen pep pla plb ple pll pln plp pn- pna pnb pne pnl pnn pnp ppa ppb ppe ppl ppn ppp