b-p bbb bbe bbi bbk bbl bbp bbs be- beb bee bei bek bel bep bes bi- bib bie bii bik bil bip bis bkb bke bkk bkl bkp bks blb ble bli blk bll blp bls bpb bpe bpi bpl bpp bps bsb bse bsi bsk bsl bsp bss ebb ebe ebi ebk ebl ebp ebs eeb eee eek eel eep ees eib eie eii eik eil eip eis ekb eke eki ekl ekp eks elb ele eli elk ell elp els ep- epb epe epi epl epp eps es- esb ese esi esk esl esp ess ibb ibe ibi ibk ibl ibp ibs ie- iee iei iek iel iep ies iib iie iii iil iip iis ikb ike iki ikk ikl iks il- ilb ile ili ilk ill ilp ils ipb ipe ipi ipl ipp ips is- isb ise isi isk isl isp iss kbb kbe kbi kbk kbl kbp kbs ke- keb kee kei kek kel kep kes kib kie kii kik kil kip kis kkb kke kki kkk kkl kkp kks kl- klb kli kls kpe kpi kpk kpl kpp kps ksb kse ksi ksk ksl ksp kss l-p lbb lbe lbi lbk lbl lbp lbs leb lee lei lek lel lep les lib lie lii lik lil lip lis lkb lkl lkp lks llb lle lli llk lll llp lls lpb lpe lpi lpk lpl lpp lps lsb lse lsi lsk lsl lsp lss p-p pbb pbe pbi pbk pbl pbp pbs peb pee pei pek pel pep pes pib pie pii pik pil pip pis pkb pke pki pkl pkp pks plb ple pli plk pll plp pls ppb ppe ppi ppk ppl ppp pps ps- psb pse psi psk psl psp pss sbb sbe sbi sbk sbl sbp sbs se- seb see sei sek sel sep ses sib sie sii sik sil sip sis sk- skb ske ski skk skl skp sks slb sle sli slk sll slp sls spb spe spi spk spl spp sps ss- ssb sse ssi ssk ssl ssp sss