-er bbb bbe bbg bbn bbr bbt be- beb bee beg ben ber bet bgb bge bgg bgn bgr bgt bnb bne bng bnn bnr bnt brb bre brg brn brr brt btb bte btg btn btr btt ebb ebe ebg ebn ebr ebt eeb eee eeg een eer eet egb ege egg egn egr egt en- enb ene eng enn enr ent erb ere erg ern err ert etb ete etg etn etr ett gbe gbg gbn gbr gbt ge- geb gee geg gen ger get ggb ggg ggn ggr ggt gnb gne gnn gnr gnt grb gre grg grn grr grt gtb gte gtg gtn gtr gtt nbb nbe nbg nbn nbr nbt ne- neb nee neg nen ner net ngb nge ngg ngn ngt nnb nne nng nnn nnt nrb nre nrg nrn nrr nrt ntb nte ntg ntn ntr ntt rbb rbe rbg rbn rbr rbt re- reb ree reg ren rer ret rgb rge rgg rgn rgr rgt rnb rng rnn rnr rnt rrb rrg rrn rrr rrt rtb rte rtg rtn rtr rtt tbb tbe tbg tbn tbr tbt te- teb tee teg ten ter tet tgb tge tgg tgn tgr tgt tnb tne tng tnn tnr tnt trb tre trg trn trr trt ttb tte ttg ttn ttr ttt