b-p bbb bbe bbi bbl bbp bbx be- beb bee bei bel bep bex bi- bib bie bii bil bip bix blb ble bli bll blp blx bpb bpe bpi bpl bpp bpx bxb bxi bxl bxx ebb ebe ebi ebl ebp ebx eeb eee eel eep eex eib eie eii eil eip eix elb ele eli ell elp elx ep- epb epe epi epl epp epx ex- exe exi exl exp exx ibb ibe ibi ibl ibp ibx ie- iee iei iel iep iex iib iie iii iil iip iix il- ilb ile ili ill ilp ilx ipb ipe ipi ipl ipp ipx ixe ixi ixl l-p lbb lbe lbi lbl lbp lbx leb lee lei lel lep lex lib lie lii lil lip lix llb lle lli lll llp lpb lpe lpi lpl lpp lpx lxi lxx p-p pbb pbe pbi pbl pbp pbx peb pee pei pel pep pex pib pie pii pil pip pix plb ple pli pll plp plx ppb ppe ppi ppl ppp ppx pxe pxl xbe xbl xbx xee xel xep xex xie xii xix xlb xli xpb xpe xpl xpp xxi xxl xxp xxx