-er -ol bbb bbd bbe bbl bbo bbr bbs bbt bdb bdd bde bdl bdo bdr bds bdt be- beb bed bee bel beo ber bes bet blb bld ble bll blo blr bls blt bob bod boe bol boo bor bos bot brb brd bre brl bro brr brs brt bsb bsd bse bsl bso bsr bss bst btb btd bte btl bto btr bts btt dbb dbd dbe dbl dbo dbr dbs dbt ddb ddd dde ddl ddo ddr dds ddt de- deb ded dee del deo der des det dl- dlb dld dle dll dlo dlr dls dlt dob dod doe dol doo dor dos dot drb drd dre drl dro drr drs drt dsb dsd dse dsl dso dsr dss dst dtb dtd dte dtl dto dtr dts dtt ebb ebd ebe ebl ebo ebr ebs ebt ed- edb edd ede edl edo edr eds edt eeb eed eee eel eeo eer ees eet elb eld ele ell elo elr els elt eo- eob eod eoe eol eoo eor eos eot erb erd ere erl ero err ers ert es- esb esd ese esl eso esr ess est etb etd ete etl eto etr ets ett lbb lbd lbe lbl lbo lbr lbs lbt ldb ldd lde ldl ldo ldr lds ldt leb led lee lel leo ler les let llb lld lle lll llo llr lls llt lob lod loe lol loo lor los lot lrb lrd lro lrr lrs lrt lsb lsd lse lsl lso lsr lss lst ltb ltd lte ltl lto ltr lts ltt ob- obb obd obe obl obo obr obs obt odb odd ode odl odo odr ods odt oeb oed oee oel oeo oer oes oet olb old ole oll olo ols olt oo- oob ood ool ooo oor oos oot or- orb ord ore orl oro orr ors ort os- osb osd ose osl oso osr oss ost ot- otb otd ote otl oto otr ots ott rbb rbd rbe rbl rbo rbr rbs rbt rdb rdd rde rdl rdo rdr rds rdt re- reb red ree rel reo rer res ret rld rle rll rlo rlr rls rlt rob rod roe rol roo ror ros rot rrb rrd rrl rrr rrs rrt rsb rsd rse rsl rso rsr rss rst rtb rtd rte rtl rto rtr rts rtt sbb sbd sbe sbl sbo sbr sbs sbt sdb sdd sde sdl sdo sdr sds sdt se- seb sed see sel seo ser ses set slb sld sle sll slo slr sls slt sob sod soe sol soo sor sos sot sr- srb srd sre srl sro srr srs srt ss- ssb ssd sse ssl sso ssr sss sst stb std ste stl sto str sts stt tbb tbd tbe tbl tbo tbr tbs tbt tdb tdd tde tdl tdo tdr tds tdt te- teb ted tee tel teo ter tes tet tld tle tll tlo tlr tls tlt to- tob tod toe tol too tor tos tot trb trd tre trl tro trr trs trt tsb tsd tse tsl tso tsr tss tst ttb ttd tte ttl tto ttr tts ttt