-er bbb bbd bbe bbg bbo bbr bbt bdb bdd bde bdg bdo bdr bdt be- beb bed bee beg beo ber bet bgb bgd bge bgg bgo bgr bgt bob bod boe bog boo bor bot brb brd bre brg bro brr brt btb btd bte btg bto btr btt dbb dbd dbe dbg dbo dbr dbt ddb ddd dde ddg ddo ddr ddt de- deb ded dee deg deo der det dgd dge dgg dgr dgt dob dod doe dog doo dor dot drb drd dre drg dro drr drt dtb dtd dte dtg dto dtr dtt ebb ebd ebe ebg ebo ebr ebt ed- edb edd ede edg edo edr edt eeb eed eee eeg eeo eer eet egb egd ege egg ego egr egt eo- eob eod eoe eog eoo eor eot erb erd ere erg ero err ert etb etd ete etg eto etr ett g-d gbd gbe gbg gbo gbr gbt gdb gdd gde gdo gdr gdt ge- geb ged gee geg geo ger get ggb ggd ggg ggo ggr ggt gob god goe gog goo gor got grb grd gre grg gro grr grt gtb gtd gte gtg gto gtr gtt ob- obb obd obe obg obo obr obt odb odd ode odg odo odr odt oeb oed oee oeg oeo oer oet ogd oge ogg ogo ogt oo- oob ood oog ooo oor oot or- orb ord ore org oro orr ort ot- otb otd ote otg oto otr ott rbb rbd rbe rbg rbo rbr rbt rdb rdd rde rdg rdo rdr rdt re- reb red ree reg reo rer ret rgb rgd rge rgg rgo rgr rgt rob rod roe rog roo ror rot rrb rrd rrg rrr rrt rtb rtd rte rtg rto rtr rtt tbb tbd tbe tbg tbo tbr tbt tdb tdd tde tdg tdo tdr tdt te- teb ted tee teg teo ter tet tgb tge tgg tgo tgr tgt to- tob tod toe tog too tor tot trb trd tre trg tro trr trt ttb ttd tte ttg tto ttr ttt