-er bbb bbd bbe bbg bbo bbr bbs bbt bdb bdd bde bdg bdo bdr bds bdt be- beb bed bee beg beo ber bes bet bgb bgd bge bgg bgo bgr bgs bgt bob bod boe bog boo bor bos bot brb brd bre brg bro brr brs brt bsb bsd bse bsg bso bsr bss bst btb btd bte btg bto btr bts btt dbb dbd dbe dbg dbo dbr dbs dbt ddb ddd dde ddg ddo ddr dds ddt de- deb ded dee deg deo der des det dgd dge dgg dgr dgs dgt dob dod doe dog doo dor dos dot drb drd dre drg dro drr drs drt dsb dsd dse dsg dso dsr dss dst dtb dtd dte dtg dto dtr dts dtt ebb ebd ebe ebg ebo ebr ebs ebt ed- edb edd ede edg edo edr eds edt eeb eed eee eeg eeo eer ees eet egb egd ege egg ego egr egs egt eo- eob eod eoe eog eoo eor eos eot erb erd ere erg ero err ers ert es- esb esd ese esg eso esr ess est etb etd ete etg eto etr ets ett g-d gbd gbe gbg gbo gbr gbs gbt gdb gdd gde gdo gdr gds gdt ge- geb ged gee geg geo ger ges get ggb ggd ggg ggo ggr ggs ggt gob god goe gog goo gor gos got grb grd gre grg gro grr grs grt gsb gsd gse gsg gso gsr gss gst gtb gtd gte gtg gto gtr gts gtt ob- obb obd obe obg obo obr obs obt odb odd ode odg odo odr ods odt oeb oed oee oeg oeo oer oes oet ogd oge ogg ogo ogs ogt oo- oob ood oog ooo oor oos oot or- orb ord ore org oro orr ors ort os- osb osd ose osg oso osr oss ost ot- otb otd ote otg oto otr ots ott rbb rbd rbe rbg rbo rbr rbs rbt rdb rdd rde rdg rdo rdr rds rdt re- reb red ree reg reo rer res ret rgb rgd rge rgg rgo rgr rgs rgt rob rod roe rog roo ror ros rot rrb rrd rrg rrr rrs rrt rsb rsd rse rsg rso rsr rss rst rtb rtd rte rtg rto rtr rts rtt sbb sbd sbe sbg sbo sbr sbs sbt sdb sdd sde sdg sdo sdr sds sdt se- seb sed see seg seo ser ses set sgb sgd sge sgg sgo sgr sgs sgt sob sod soe sog soo sor sos sot sr- srb srd sre srg sro srr srs srt ss- ssb ssd sse ssg sso ssr sss sst stb std ste stg sto str sts stt tbb tbd tbe tbg tbo tbr tbs tbt tdb tdd tde tdg tdo tdr tds tdt te- teb ted tee teg teo ter tes tet tgb tge tgg tgo tgr tgs tgt to- tob tod toe tog too tor tos tot trb trd tre trg tro trr trs trt tsb tsd tse tsg tso tsr tss tst ttb ttd tte ttg tto ttr tts ttt