-al a-a a-b aaa aab aae aal aap ab- aba abb abe abl abp aea aeb aee ael aep al- ala alb ale all alp ap- apa apb ape apl app b-p baa bab bae bal bap bba bbb bbe bbl bbp be- bea beb bee bel bep bla blb ble bll blp bpa bpb bpe bpl bpp eaa eab eae eal eap eba ebb ebe ebl ebp eea eeb eee eel eep ela elb ele ell elp ep- epa epb epe epl epp l-p la- laa lab lae lal lap lba lbb lbe lbl lbp lea leb lee lel lep lla llb lle lll llp lpa lpb lpe lpl lpp p-p paa pab pae pal pap pba pbb pbe pbl pbp pea peb pee pel pep pla plb ple pll plp ppa ppb ppe ppl ppp