b-p bbb bbc bbl bbn bbp bbr bbs bbt bcb bcc bcl bcn bcp bcr bcs bct blb blc bll bln blp blr bls blt bnb bnc bnl bnn bnp bnr bns bnt bpb bpc bpl bpn bpp bpr bps bpt brb brl brn brp brr brs brt bsb bsc bsl bsn bsp bsr bss bst btb btc btl btn btp btr bts btt c-- cbb cbc cbl cbn cbp cbr cbs cbt ccb ccc ccl ccn ccp ccr ccs cct cl- clb clc cll cln clp clr cls clt cn- cnb cnc cnl cnn cnp cnr cns cnt cpb cpc cpl cpn cpp cpr cps cpt crb crc crl crn crp crr crs crt csb csc csl csn csp csr css cst ctb ctc ctl ctn ctp ctr cts ctt l-p lbb lbc lbl lbp lbr lbs lbt lcb lcc lcl lcn lcp lcr lcs lct llb llc lll lln llp llr lls llt lnb lnc lnl lnn lnp lnr lns lnt lpb lpc lpl lpn lpp lpr lps lpt lrb lrc lrn lrp lrr lrs lrt lsb lsc lsl lsn lsp lsr lss lst ltb ltc ltl ltp ltr lts ltt nbb nbc nbl nbn nbp nbr nbs nbt ncb ncc ncl ncn ncp ncr ncs nct nlb nlc nll nln nlp nlr nls nlt nnb nnc nnl nnn nnp nns nnt npb npc npl npn npp npr nps npt nrb nrc nrl nrn nrp nrr nrs nrt nsb nsc nsl nsn nsp nsr nss nst ntb ntc ntn ntp ntr nts ntt p-p pbb pbc pbl pbn pbp pbr pbs pbt pcb pcc pcl pcn pcp pcr pcs pct plb plc pll pln plp plr pls plt pn- pnb pnc pnl pnn pnp pnr pns pnt ppb ppc ppl ppn ppp ppr pps ppt prb prc prl prn prp prr prs prt ps- psb psc psl psn psp psr pss pst pt- ptb ptc ptl ptn ptp ptr pts ptt rbb rbc rbl rbn rbp rbr rbs rbt rcb rcc rcl rcn rcp rcr rcs rct rlc rll rln rlp rlr rls rlt rnb rnc rnn rnp rnr rns rnt rpb rpc rpl rpn rpp rpr rps rpt rrb rrc rrl rrn rrp rrr rrs rrt rsb rsc rsl rsn rsp rsr rss rst rtb rtc rtl rtn rtp rtr rts rtt sbb sbc sbl sbn sbp sbr sbs sbt scb scc scl scn scp scr scs sct slb slc sll sln slp slr sls slt snb snc snl snn snp snr sns snt spb spc spl spn spp spr sps spt sr- srb src srl srn srp srr srs srt ss- ssb ssc ssl ssn ssp ssr sss sst stb stc stl stn stp str sts stt tbb tbc tbl tbn tbp tbr tbs tbt tcb tcc tcl tcn tcp tcr tcs tct tlc tll tln tlp tlr tls tlt tnb tnc tnl tnn tnp tnr tns tnt tpb tpc tpl tpn tpp tpr tps tpt trb trc trl trn trp trr trs trt tsb tsc tsl tsn tsp tsr tss tst ttb ttc ttl ttn ttp ttr tts ttt