-al a-a a-b aaa aab aad aae aal aap ab- aba abb abd abe abl abp ad- ada adb add ade adl adp aea aeb aed aee ael aep al- ala alb ald ale all alp ap- apa apb apd ape apl app b-p baa bab bad bae bal bap bba bbb bbd bbe bbl bbp bda bdb bdd bde bdl bdp be- bea beb bed bee bel bep bla blb bld ble bll blp bpa bpb bpd bpe bpl bpp daa dab dad dae dal dap dba dbb dbd dbe dbl dbp dda ddb ddd dde ddl ddp de- dea deb ded dee del dep dl- dla dlb dld dle dll dlp dpa dpb dpd dpe dpl dpp eaa eab ead eae eal eap eba ebb ebd ebe ebl ebp ed- eda edb edd ede edl edp eea eeb eed eee eel eep ela elb eld ele ell elp ep- epa epb epd epe epl epp l-p la- laa lab lad lae lal lap lba lbb lbd lbe lbl lbp lda ldb ldd lde ldl ldp lea leb led lee lel lep lla llb lld lle lll llp lpa lpb lpd lpe lpl lpp p-p paa pab pad pae pal pap pba pbb pbd pbe pbl pbp pda pdb pdd pde pdl pdp pea peb ped pee pel pep pla plb pld ple pll plp ppa ppb ppd ppe ppl ppp