-er b-u bbb bbe bbg bbr bbt bbu be- beb bee beg ber bet beu bez bgb bge bgg bgr bgt bgu bgz brb bre brg brr brt bru brz btb bte btg btr btt btu btz bub bue bug bur but buu buz bze bzr bzu bzz ebb ebe ebg ebr ebt ebu eeb eee eeg eer eet egb ege egg egr egt egu erb ere erg err ert eru erz etb ete etg etr ett etu etz eu- eub eue eug eur eut eze ezr ezz gbe gbg gbr gbt gbu gbz ge- geb gee geg ger get geu gez ggb ggg ggr ggt ggu ggz grb gre grg grr grt gru gtb gte gtg gtr gtt gtu gu- gub gue gug gur gut guu guz gzr gzu rbb rbe rbg rbr rbt rbu re- reb ree reg rer ret reu rez rgb rge rgg rgr rgt rrb rrg rrr rrt rru rtb rte rtg rtr rtt rtu rtz rub rue rug rur rut ruu ruz rzb rze tbb tbe tbg tbr tbt tbu tbz te- teb tee teg ter tet teu tez tgb tge tgg tgr tgt tgu tgz trb tre trg trr trt tru trz ttb tte ttg ttr ttt ttu tub tue tug tur tut tuu tuz tze tzu ubb ube ubg ubr ubt ubu ueb uee ueg uer uet ugb uge ugg ugr ugt ugu ur- urb ure urg urr urt uru urz utb ute utr utt utu utz uue uug uur uut uuu uzb uzu z-g zbb zbr zbt zeb zee zer zet zez zgb zgg zte ztr zub zug zur zut zuz zzr zzt zzz