-er -ol bbb bbc bbd bbe bbf bbl bbo bbr bbs bcb bcc bcd bce bcf bcl bco bcr bcs bdb bdc bdd bde bdf bdl bdo bdr bds be- beb bec bed bee bef bel beo ber bes bfb bfc bfd bfe bff bfl bfo bfr bfs blb blc bld ble blf bll blo blr bls bob boc bod boe bof bol boo bor bos brb brd bre brf brl bro brr brs bsb bsc bsd bse bsf bsl bso bsr bss c-- cbb cbc cbd cbe cbf cbl cbo cbr cbs ccb ccc ccd cce ccf ccl cco ccr ccs cdb cdc cdd cde cdf cdl cdo cdr cds ce- ceb cec ced cee cef cel ceo cer ces cfb cfc cfd cfe cff cfl cfo cfr cfs cl- clb clc cld cle clf cll clo clr cls co- cob coc cod coe cof col coo cor cos crb crc crd cre crf crl cro crr crs csb csc csd cse csf csl cso csr css dbb dbc dbd dbe dbf dbl dbo dbr dbs dcb dcc dcd dce dcf dcl dco dcr dcs ddb ddc ddd dde ddf ddl ddo ddr dds de- deb dec ded dee def del deo der des dfb dfc dfd dfe dff dfl dfo dfr dfs dl- dlb dlc dld dle dlf dll dlo dlr dls dob doc dod doe dof dol doo dor dos drb drc drd dre drl dro drr drs dsb dsc dsd dse dsf dsl dso dsr dss ebb ebc ebd ebe ebf ebl ebo ebr ebs ec- ecb ecc ecd ece ecf ecl eco ecr ecs ed- edb edc edd ede edf edl edo edr eds eeb eec eed eee eef eel eeo eer ees ef- efb efc efd efe eff efl efo efr efs elb elc eld ele elf ell elo elr els eo- eob eoc eod eoe eof eol eoo eor eos erb erc erd ere erf erl ero err ers es- esb esc esd ese esf esl eso esr ess fbb fbc fbd fbe fbf fbl fbo fbr fbs fcb fcc fcd fce fcf fcl fco fcr fcs fdb fdc fdd fde fdf fdl fdo fdr fds feb fec fed fee fef fel feo fer fes ffc ffd ffe fff ffl ffo ffr ffs flb flc fld fle flf fll flo flr fls fob foc foe fof fol foo for fos frb frc frd fre frf frl fro frr frs fsb fsc fsd fse fsf fsl fso fsr fss lbb lbc lbd lbe lbf lbl lbo lbr lbs lcb lcc lcd lce lcf lcl lco lcr lcs ldb ldc ldd lde ldf ldl ldo ldr lds leb lec led lee lef lel leo ler les lfb lfc lfd lfe lff lfl lfo lfr lfs llb llc lld lle llf lll llo llr lls lob loc lod loe lof lol loo lor los lrb lrc lrd lrf lro lrr lrs lsb lsc lsd lse lsf lsl lso lsr lss ob- obb obc obd obe obf obl obo obr obs oc- ocb occ ocd ocf ocl oco ocr ocs odb odc odd ode odf odl odo odr ods oeb oec oed oee oef oel oeo oer oes of- ofb ofc ofd ofe off ofl ofo ofr ofs olb olc old ole olf oll olo ols oo- oob ooc ood oof ool ooo oor oos or- orb orc ord ore orf orl oro orr ors os- osb osc osd ose osf osl oso osr oss rbb rbc rbd rbe rbf rbl rbo rbr rbs rcb rcc rcd rce rcf rcl rco rcr rcs rdb rdc rdd rde rdf rdl rdo rdr rds re- reb rec red ree ref rel reo rer res rfb rfc rfd rfe rff rfl rfo rfr rfs rlc rld rle rlf rll rlo rlr rls rob roc rod roe rof rol roo ror ros rrb rrc rrd rrf rrl rrr rrs rsb rsc rsd rse rsf rsl rso rsr rss sbb sbc sbd sbe sbf sbl sbo sbr sbs scb scc scd sce scf scl sco scr scs sdb sdc sdd sde sdf sdl sdo sdr sds se- seb sec sed see sef sel seo ser ses sfb sfc sfd sfe sff sfl sfo sfr sfs slb slc sld sle slf sll slo slr sls sob soc sod soe sof sol soo sor sos sr- srb src srd sre srf srl sro srr srs ss- ssb ssc ssd sse ssf ssl sso ssr sss