-er -ol bbb bbc bbd bbe bbl bbo bbr bbs bbt bcb bcc bcd bce bcl bco bcr bcs bct bdb bdc bdd bde bdl bdo bdr bds bdt be- beb bec bed bee bel beo ber bes bet blb blc bld ble bll blo blr bls blt bob boc bod boe bol boo bor bos bot brb brd bre brl bro brr brs brt bsb bsc bsd bse bsl bso bsr bss bst btb btc btd bte btl bto btr bts btt c-- cbb cbc cbd cbe cbl cbo cbr cbs cbt ccb ccc ccd cce ccl cco ccr ccs cct cdb cdc cdd cde cdl cdo cdr cds cdt ce- ceb cec ced cee cel ceo cer ces cet cl- clb clc cld cle cll clo clr cls clt co- cob coc cod coe col coo cor cos cot crb crc crd cre crl cro crr crs crt csb csc csd cse csl cso csr css cst ctb ctc ctd cte ctl cto ctr cts ctt dbb dbc dbd dbe dbl dbo dbr dbs dbt dcb dcc dcd dce dcl dco dcr dcs dct ddb ddc ddd dde ddl ddo ddr dds ddt de- deb dec ded dee del deo der des det dl- dlb dlc dld dle dll dlo dlr dls dlt dob doc dod doe dol doo dor dos dot drb drc drd dre drl dro drr drs drt dsb dsc dsd dse dsl dso dsr dss dst dtb dtc dtd dte dtl dto dtr dts dtt ebb ebc ebd ebe ebl ebo ebr ebs ebt ec- ecb ecc ecd ece ecl eco ecr ecs ect ed- edb edc edd ede edl edo edr eds edt eeb eec eed eee eel eeo eer ees eet elb elc eld ele ell elo elr els elt eo- eob eoc eod eoe eol eoo eor eos eot erb erc erd ere erl ero err ers ert es- esb esc esd ese esl eso esr ess est etb etc etd ete etl eto etr ets ett lbb lbc lbd lbe lbl lbo lbr lbs lbt lcb lcc lcd lce lcl lco lcr lcs lct ldb ldc ldd lde ldl ldo ldr lds ldt leb lec led lee lel leo ler les let llb llc lld lle lll llo llr lls llt lob loc lod loe lol loo lor los lot lrb lrc lrd lro lrr lrs lrt lsb lsc lsd lse lsl lso lsr lss lst ltb ltc ltd lte ltl lto ltr lts ltt ob- obb obc obd obe obl obo obr obs obt oc- ocb occ ocd ocl oco ocr ocs oct odb odc odd ode odl odo odr ods odt oeb oec oed oee oel oeo oer oes oet olb olc old ole oll olo ols olt oo- oob ooc ood ool ooo oor oos oot or- orb orc ord ore orl oro orr ors ort os- osb osc osd ose osl oso osr oss ost ot- otb otc otd ote otl oto otr ots ott rbb rbc rbd rbe rbl rbo rbr rbs rbt rcb rcc rcd rce rcl rco rcr rcs rct rdb rdc rdd rde rdl rdo rdr rds rdt re- reb rec red ree rel reo rer res ret rlc rld rle rll rlo rlr rls rlt rob roc rod roe rol roo ror ros rot rrb rrc rrd rrl rrr rrs rrt rsb rsc rsd rse rsl rso rsr rss rst rtb rtc rtd rte rtl rto rtr rts rtt sbb sbc sbd sbe sbl sbo sbr sbs sbt scb scc scd sce scl sco scr scs sct sdb sdc sdd sde sdl sdo sdr sds sdt se- seb sec sed see sel seo ser ses set slb slc sld sle sll slo slr sls slt sob soc sod soe sol soo sor sos sot sr- srb src srd sre srl sro srr srs srt ss- ssb ssc ssd sse ssl sso ssr sss sst stb stc std ste stl sto str sts stt tbb tbc tbd tbe tbl tbo tbr tbs tbt tcb tcc tcd tce tcl tco tcr tcs tct tdb tdc tdd tde tdl tdo tdr tds tdt te- teb tec ted tee tel teo ter tes tet tlc tld tle tll tlo tlr tls tlt to- tob toc tod toe tol too tor tos tot trb trc trd tre trl tro trr trs trt tsb tsc tsd tse tsl tso tsr tss tst ttb ttc ttd tte ttl tto ttr tts ttt