b-p bbb bbc bbd bbe bbk bbl bbp bbs bcb bcc bcd bce bck bcl bcp bcs bdb bdc bdd bde bdk bdl bdp bds be- beb bec bed bee bek bel bep bes bkb bkc bke bkk bkl bkp bks blb blc bld ble blk bll blp bls bpb bpc bpd bpe bpl bpp bps bsb bsc bsd bse bsk bsl bsp bss c-- cbb cbc cbd cbe cbk cbl cbp cbs ccb ccc ccd cce cck ccl ccp ccs cdb cdc cdd cde cdk cdl cdp cds ce- ceb cec ced cee cek cel cep ces ckb ckc ckd cks cl- clb clc cld cle clk cll clp cls cpb cpc cpd cpe cpk cpl cpp cps csb csc csd cse csk csl csp css dbb dbc dbd dbe dbk dbl dbp dbs dcb dcc dcd dce dck dcl dcp dcs ddb ddc ddd dde ddk ddl ddp dds de- deb dec ded dee dek del dep des dkb dkc dke dkk dkl dkp dks dl- dlb dlc dld dle dlk dll dlp dls dpb dpc dpd dpe dpk dpl dpp dps dsb dsc dsd dse dsk dsl dsp dss ebb ebc ebd ebe ebk ebl ebp ebs ec- ecb ecc ecd ece eck ecl ecs ed- edb edc edd ede edk edl edp eds eeb eec eed eee eek eel eep ees ekb ekc ekd eke ekl ekp eks elb elc eld ele elk ell elp els ep- epb epc epd epe epl epp eps es- esb esc esd ese esk esl esp ess kbb kbc kbd kbe kbk kbl kbp kbs kcb kcc kcd kce kck kcl kcp kcs kdb kdc kde kdk kdl kdp kds ke- keb kec ked kee kek kel kep kes kkb kkc kke kkk kkl kkp kks kl- klb klc kld kls kpc kpd kpe kpk kpl kpp kps ksb ksc ksd kse ksk ksl ksp kss l-p lbb lbc lbd lbe lbk lbl lbp lbs lcb lcc lcd lce lck lcl lcp lcs ldb ldc ldd lde ldk ldl ldp lds leb lec led lee lek lel lep les lkb lkl lkp lks llb llc lld lle llk lll llp lls lpb lpc lpd lpe lpk lpl lpp lps lsb lsc lsd lse lsk lsl lsp lss p-p pbb pbc pbd pbe pbk pbl pbp pbs pcb pcc pcd pce pck pcl pcp pcs pdb pdc pdd pde pdk pdl pdp pds peb pec ped pee pek pel pep pes pkb pkc pkd pke pkl pkp pks plb plc pld ple plk pll plp pls ppb ppc ppd ppe ppk ppl ppp pps ps- psb psc psd pse psk psl psp pss sbb sbc sbd sbe sbk sbl sbp sbs scb scc scd sce sck scl scp scs sdb sdc sdd sde sdk sdl sdp sds se- seb sec sed see sek sel sep ses sk- skb skc skd ske skk skl skp sks slb slc sld sle slk sll slp sls spb spc spd spe spk spl spp sps ss- ssb ssc ssd sse ssk ssl ssp sss