b-p bbb bbe bbi bbl bbp bbt bbx be- beb bee bei bel bep bet bex bi- bib bie bii bil bip bit bix blb ble bli bll blp blt blx bpb bpe bpi bpl bpp bpt bpx btb bte bti btl btp btt btx bxb bxi bxl bxx ebb ebe ebi ebl ebp ebt ebx eeb eee eel eep eet eex eib eie eii eil eip eit eix elb ele eli ell elp elt elx ep- epb epe epi epl epp ept epx etb ete eti etl etp ett etx ex- exe exi exl exp ext exx ibb ibe ibi ibl ibp ibt ibx ie- iee iei iel iep iet iex iib iie iii iil iip iit iix il- ilb ile ili ill ilp ilt ilx ipb ipe ipi ipl ipp ipt ipx itb ite iti itl itp itt itx ixe ixi ixl l-p lbb lbe lbi lbl lbp lbt lbx leb lee lei lel lep let lex lib lie lii lil lip lit lix llb lle lli lll llp llt lpb lpe lpi lpl lpp lpt lpx ltb lte lti ltl ltp ltt ltx lxi lxx p-p pbb pbe pbi pbl pbp pbt pbx peb pee pei pel pep pet pex pib pie pii pil pip pit pix plb ple pli pll plp plt plx ppb ppe ppi ppl ppp ppt ppx pt- ptb pte pti ptl ptp ptt ptx pxe pxl pxt t-x tbb tbe tbi tbl tbp tbt te- teb tee tei tel tep tet tex tib tie tii til tip tit tix tle tli tll tlp tlt tlx tpb tpe tpi tpl tpp tpt tpx ttb tte tti ttl ttp ttt ttx txe txi txl txt xbe xbl xbx xee xel xep xet xex xie xii xit xix xlb xli xlt xpb xpe xpl xpp xpt xti xtp xtx xxi xxl xxp xxx