b-p bbb bbf bbk bbl bbp bbr bbs bfb bff bfl bfp bfr bfs bkb bkf bkk bkl bkp bkr bks blb blf blk bll blp blr bls bpb bpf bpl bpp bpr bps brb brf brk brl brp brr brs bsb bsf bsk bsl bsp bsr bss fbb fbf fbk fbl fbp fbr fbs fff ffk ffl ffp ffr ffs fkb fkf fkk fkl fkp flb flf fll flp flr fls fpb fpk fpl fpp fpr fps frb frf frk frl frp frr frs fsb fsf fsk fsl fsp fsr fss kbb kbf kbk kbl kbp kbr kbs kff kfs kkb kkk kkl kkp kkr kks kl- klb klf klr kls kpf kpk kpl kpp kpr kps krf krk krl krp krr krs ksb ksf ksk ksl ksp ksr kss l-p lbb lbf lbk lbl lbp lbr lbs lfb lff lfk lfl lfp lfr lfs lkb lkl lkp lkr lks llb llf llk lll llp llr lls lpb lpf lpk lpl lpp lpr lps lrb lrf lrk lrp lrr lrs lsb lsf lsk lsl lsp lsr lss p-p pbb pbf pbk pbl pbp pbr pbs pfb pff pfk pfl pfp pfr pfs pkb pkf pkl pkp pkr pks plb plf plk pll plp plr pls ppb ppf ppk ppl ppp ppr pps prb prf prk prl prp prr prs ps- psb psf psk psl psp psr pss rbb rbf rbk rbl rbp rbr rbs rfb rff rfk rfl rfp rfr rfs rkb rkf rkk rkp rks rlf rll rlp rlr rls rpb rpf rpk rpl rpp rpr rps rrb rrf rrk rrl rrp rrr rrs rsb rsf rsk rsl rsp rsr rss sbb sbf sbk sbl sbp sbr sbs sfb sff sfk sfl sfp sfr sfs sk- skb skf skk skl skp skr sks slb slf slk sll slp slr sls spb spf spk spl spp spr sps sr- srb srf srk srl srp srr srs ss- ssb ssf ssk ssl ssp ssr sss