-er -ic bbb bbc bbd bbe bbf bbi bbk bbl bbr bbs bcb bcc bcd bce bcf bci bck bcl bcr bcs bdb bdc bdd bde bdf bdi bdk bdl bdr bds be- beb bec bed bee bef bei bek bel ber bes bfb bfc bfd bfe bff bfi bfl bfr bfs bi- bib bic bid bie bif bii bik bil bir bis bkb bkc bke bkf bkk bkl bkr bks blb blc bld ble blf bli blk bll blr bls brb brd bre brf bri brk brl brr brs bsb bsc bsd bse bsf bsi bsk bsl bsr bss c-- cbb cbc cbd cbe cbf cbi cbk cbl cbr cbs ccb ccc ccd cce ccf cci cck ccl ccr ccs cdb cdc cdd cde cdf cdi cdk cdl cdr cds ce- ceb cec ced cee cef cei cek cel cer ces cfb cfc cfd cfe cff cfi cfk cfl cfr cfs ci- cib cic cid cie cif cii cik cil cir cis ckb ckc ckd cki cks cl- clb clc cld cle clf cli clk cll clr cls crb crc crd cre crf cri crk crl crr crs csb csc csd cse csf csi csk csl csr css dbb dbc dbd dbe dbf dbi dbk dbl dbr dbs dcb dcc dcd dce dcf dci dck dcl dcr dcs ddb ddc ddd dde ddf ddi ddk ddl ddr dds de- deb dec ded dee def dei dek del der des dfb dfc dfd dfe dff dfi dfk dfl dfr dfs di- dib dic did die dif dii dik dil dir dis dkb dkc dke dki dkk dkl dkr dks dl- dlb dlc dld dle dlf dli dlk dll dlr dls drb drc drd dre dri drk drl drr drs dsb dsc dsd dse dsf dsi dsk dsl dsr dss ebb ebc ebd ebe ebf ebi ebk ebl ebr ebs ec- ecb ecc ecd ece ecf eci eck ecl ecr ecs ed- edb edc edd ede edf edi edk edl edr eds eeb eec eed eee eef eek eel eer ees ef- efb efc efd efe eff efi efl efr efs eib eic eid eie eif eii eik eil eir eis ekb ekc ekd eke ekf eki ekl ekr eks elb elc eld ele elf eli elk ell elr els erb erc erd ere erf eri erk erl err ers es- esb esc esd ese esf esi esk esl esr ess fbb fbc fbd fbe fbf fbi fbk fbl fbr fbs fcb fcc fcd fce fcf fci fck fcl fcr fcs fdb fdc fdd fde fdf fdi fdk fdl fdr fds feb fec fed fee fef fei fek fel fer fes ffc ffd ffe fff ffi ffk ffl ffr ffs fib fic fid fie fif fii fik fil fir fis fkb fkc fkf fki fkk fkl flb flc fld fle flf fli fll flr fls frb frc frd fre frf fri frk frl frr frs fsb fsc fsd fse fsf fsi fsk fsl fsr fss i-d i-f ibb ibc ibd ibe ibf ibi ibk ibl ibr ibs icb icc icd ice icf ici ick icl icr ics idb idc idd ide idf idi idk idl idr ids ie- iec ied iee ief iei iek iel ier ies ifb ifc ifd ife iff ifi ifl ifr ifs iib iic iid iie iif iii iil iir iis ikb ikc ike ikf iki ikk ikl ikr iks il- ilb ilc ild ile ilf ili ilk ill ilr ils ir- irb irc ird ire irf iri irk irl irr irs is- isb isc isd ise isf isi isk isl isr iss kbb kbc kbd kbe kbf kbi kbk kbl kbr kbs kcb kcc kcd kce kci kck kcl kcr kcs kdb kdc kde kdf kdk kdl kdr kds ke- keb kec ked kee kef kei kek kel ker kes kfc kfd kff kfi kfs kib kic kid kie kif kii kik kil kir kis kkb kkc kke kki kkk kkl kkr kks kl- klb klc kld klf kli klr kls krc krd krf kri krk krl krr krs ksb ksc ksd kse ksf ksi ksk ksl ksr kss lbb lbc lbd lbe lbf lbi lbk lbl lbr lbs lcb lcc lcd lce lcf lci lck lcl lcr lcs ldb ldc ldd lde ldf ldi ldk ldl ldr lds leb lec led lee lef lei lek lel ler les lfb lfc lfd lfe lff lfi lfk lfl lfr lfs lib lic lid lie lif lii lik lil lir lis lkb lkl lkr lks llb llc lld lle llf lli llk lll llr lls lrb lrc lrd lrf lri lrk lrr lrs lsb lsc lsd lse lsf lsi lsk lsl lsr lss rbb rbc rbd rbe rbf rbi rbk rbl rbr rbs rcb rcc rcd rce rcf rci rcl rcr rcs rdb rdc rdd rde rdf rdi rdl rdr rds re- reb rec red ree ref rei rek rel rer res rfb rfc rfd rfe rff rfi rfk rfl rfr rfs rib ric rid rie rif rii rik ril rir ris rkb rkc rke rkf rkk rks rlc rld rle rlf rli rll rlr rls rrb rrc rrd rrf rri rrk rrl rrr rrs rsb rsc rsd rse rsf rsi rsk rsl rsr rss sbb sbc sbd sbe sbf sbi sbk sbl sbr sbs scb scc scd sce scf sci sck scl scr scs sdb sdc sdd sde sdf sdi sdk sdl sdr sds se- seb sec sed see sef sei sek sel ser ses sfb sfc sfd sfe sff sfi sfk sfl sfr sfs sib sic sid sie sif sii sik sil sir sis sk- skb skc skd ske skf ski skk skl skr sks slb slc sld sle slf sli slk sll slr sls sr- srb src srd sre srf sri srk srl srr srs ss- ssb ssc ssd sse ssf ssi ssk ssl ssr sss

bbbb bbbs bbci bbdd bbeb bbfc bblb bbls bbrc bcbc bcbs bccc bcci bccl bccs bcde bcds bcec bcer bces bcfc bcie bcis bcrs bcsc bcsl bcss bd-r bdbc