-er -ey bbb bbc bbe bbg bbk bbr bby bcb bcc bce bcg bck bcr bcy be- beb bec bee beg bek ber bey bgb bgc bge bgg bgk bgr bkb bkc bke bkg bkk bkr brb bre brg brk brr bry by- byc bye byg byk byr c-- cbb cbc cbe cbg cbk cbr cby ccb ccc cce ccg cck ccr ce- ceb cec cee ceg cek cer cey cgb cgc cge cgg cgr cgy ckb ckc cky crb crc cre crg crk crr cry cyb cyc cye cyg cyk cyr ebb ebc ebe ebg ebk ebr eby ec- ecb ecc ece ecg eck ecr eeb eec eee eeg eek eer eey egb egc ege egg egr egy ekb ekc eke ekg ekr eky erb erc ere erg erk err ery eyc eye eyr gbc gbe gbg gbk gbr gby gcb gcc gce gcg gck gcr ge- geb gec gee geg gek ger gey ggb ggc ggg ggr gkb grb grc gre grg grk grr gry gy- gyb gye gyr kbb kbc kbe kbk kbr kcb kcc kce kcg kck kcr ke- keb kec kee keg kek ker key kgb kgc kgy kkb kkc kke kkk kkr kky krc krg krk krr kry kyc kye kyr rbb rbc rbe rbg rbk rbr rcb rcc rce rcg rcr re- reb rec ree reg rek rer rey rgb rgc rge rgg rgk rgr rkb rkc rke rkg rkk rky rrb rrc rrg rrk rrr ry- ryc rye ryg ryk ryr ryy ybc ybe ybg ybr yby ycc yce ycy yeb yec yee yeg yek yer yey ygc ykk yrc yre yrg yyb yyc yye yyg yyy