-er bbb bbe bbg bbm bbo bbr bbt be- beb bee beg bem beo ber bet bgb bge bgg bgm bgo bgr bgt bmb bme bmg bmm bmo bmr bmt bob boe bog bom boo bor bot brb bre brg brm bro brr brt btb bte btg btm bto btr btt ebb ebe ebg ebm ebo ebr ebt eeb eee eeg eem eeo eer eet egb ege egg egm ego egr egt em- emb eme emg emm emo emr emt eo- eob eoe eog eom eoo eor eot erb ere erg erm ero err ert etb ete etg etm eto etr ett gbe gbg gbm gbo gbr gbt ge- geb gee geg gem geo ger get ggb ggg ggm ggo ggr ggt gmb gme gmg gmm gmo gmr gmt gob goe gog gom goo gor got grb gre grg grm gro grr grt gtb gte gtg gtm gto gtr gtt m-o m-r mbb mbe mbg mbm mbo mbr mbt meb mee meg mem meo mer met mgb mge mgm mgo mgr mgt mmb mme mmg mmm mmo mmr mmt mob moe mog mom moo mor mot mrb mre mrg mrm mro mrr mrt mtb mte mtg mtm mto mtr mtt ob- obb obe obg obm obo obr obt oeb oee oeg oem oeo oer oet oge ogg ogo ogt om- omb ome omg omm omo omr omt oo- oob oog oom ooo oor oot or- orb ore org orm oro orr ort ot- otb ote otg otm oto otr ott rbb rbe rbg rbm rbo rbr rbt re- reb ree reg rem reo rer ret rgb rge rgg rgo rgr rgt rmb rme rmg rmm rmo rmr rmt rob roe rog rom roo ror rot rrb rrg rrm rrr rrt rtb rte rtg rtm rto rtr rtt tbb tbe tbg tbm tbo tbr tbt te- teb tee teg tem teo ter tet tgb tge tgg tgm tgo tgr tgt tmb tme tmg tmm tmo tmr tmt to- tob toe tog tom too tor tot trb tre trg trm tro trr trt ttb tte ttg ttm tto ttr ttt