-er bbb bbe bbf bbg bbk bbr bbt be- beb bee bef beg bek ber bet bfb bfe bff bfg bfr bft bgb bge bgf bgg bgk bgr bgt bkb bke bkf bkg bkk bkr bkt brb bre brf brg brk brr brt btb bte btf btg btk btr btt ebb ebe ebf ebg ebk ebr ebt eeb eee eef eeg eek eer eet ef- efb efe eff efg efr eft egb ege egf egg egr egt ekb eke ekf ekg ekr ekt erb ere erf erg erk err ert etb ete etf etg etk etr ett fbb fbe fbf fbg fbk fbr fbt feb fee fef feg fek fer fet ffe fff ffg ffk ffr fft fgb fge fgf fgg fgr fgt fkb fkf fkg fkk fkt frb fre frf frg frk frr frt ftb fte ftf ftg ftk ftr ftt gbe gbf gbg gbk gbr gbt ge- geb gee gef geg gek ger get gfb gfe gff gfk gfr gft ggb ggg ggr ggt gkb gkt grb gre grf grg grk grr grt gtb gte gtf gtg gtk gtr gtt k-t kbb kbe kbf kbk kbr ke- keb kee kef keg kek ker ket kff kfg kgb kgf kkb kke kkk kkr kkt krf krg krk krr krt ktb kte ktf ktg ktk ktr ktt rbb rbe rbf rbg rbk rbr rbt re- reb ree ref reg rek rer ret rfb rfe rff rfg rfk rfr rft rgb rge rgf rgg rgk rgr rgt rkb rke rkf rkg rkk rkt rrb rrf rrg rrk rrr rrt rtb rte rtf rtg rtk rtr rtt tbb tbe tbf tbg tbk tbr tbt te- teb tee tef teg tek ter tet tfb tfe tff tfg tfk tfr tft tgb tge tgf tgg tgk tgr tgt tkb tke tkg tkk tkr tkt trb tre trf trg trk trr trt ttb tte ttf ttg ttk ttr ttt