-er bbb bbd bbe bbg bbr bdb bdd bde bdg bdj bdr be- beb bed bee beg ber bgb bgd bge bgg bgr bjd bjg bjj bjr brb brd bre brg brj brr dbb dbd dbe dbg dbr ddb ddd dde ddg ddr de- deb ded dee deg dej der dgd dge dgg dgr dj- djb djd dje djg drb drd dre drg drj drr ebb ebd ebe ebg ebj ebr ed- edb edd ede edg edj edr eeb eed eee eeg eer egb egd ege egg egr ejd erb erd ere erg err g-d gbd gbe gbg gbj gbr gdb gdd gde gdr ge- geb ged gee geg ger ggb ggd ggg ggj ggr gje gjg gjr grb grd gre grg grj grr j-d jbg jbj jbr jdb jde jdg jdr jeb jed jee jeg jej jer jgb jge jgr jjb jjg jjj jjr jrb jrg jrr rbb rbd rbe rbg rbr rdb rdd rde rdg rdj rdr re- reb red ree reg rer rgb rgd rge rgg rgr rjg rjr rrb rrd rrg rrr