-er b-u bbb bbc bbe bbg bbk bbl bbr bbu bcb bcc bce bcg bcj bck bcl bcr bcu be- beb bec bee beg bek bel ber beu bgb bgc bge bgg bgk bgl bgr bgu bjc bjg bjj bjk bjr bju bkb bkc bke bkg bkk bkl bkr blb blc ble blg blj blk bll blr blu brb bre brg brj brk brl brr bru bub buc bue bug buj buk bul bur buu c-- c-j cbb cbc cbe cbg cbj cbk cbl cbr cbu ccb ccc cce ccg ccj cck ccl ccr ccu ce- ceb cec cee ceg cej cek cel cer ceu cgb cgc cge cgg cgl cgr cgu cjb cjc cjg cjk cjr ckb ckc cl- clb clc cle clg clj clk cll clr clu crb crc cre crg crj crk crl crr cru cub cuc cue cug cuk cul cur cuu ebb ebc ebe ebg ebj ebk ebl ebr ebu ec- ecb ecc ece ecg ecj eck ecl ecr ecu eeb eec eee eeg eek eel eer egb egc ege egg egl egr egu ejc ejl eju ekb ekc eke ekg ekl ekr eku elb elc ele elg elk ell elr elu erb erc ere erg erk erl err eru eu- eub euc eue eug euj eul eur gbc gbe gbg gbj gbk gbl gbr gbu gcb gcc gce gcg gck gcl gcr gcu ge- geb gec gee geg gek gel ger geu ggb ggc ggg ggj ggr ggu gjc gje gjg gjr gkb glb glc gle glg glj glk gll glr glu grb grc gre grg grj grk grl grr gru gu- gub guc gue gug guj guk gul gur guu jbc jbg jbj jbk jbl jbr jbu jcb jcc jce jck jcl jcr jcu jeb jec jee jeg jej jek jel jer jeu jgb jge jgr jgu jjb jjc jjg jjj jjk jjl jjr jju jkb jkk jkl jkr jku jlb jlc jle jlg jll jlr jlu jrb jrc jrg jrk jrl jrr jub jue jug juk jul jur kbb kbc kbe kbk kbl kbr kbu kcb kcc kce kcg kck kcl kcr kcu ke- keb kec kee keg kek kel ker kgb kgc kgl kgu kjb kjc kje kjr kju kkb kkc kke kkk kkl kkr kku kl- klb klc klg klr klu krc krg krk krl krr kru kub kuc kue kug kuj kuk kul kur kuu lbb lbc lbe lbg lbj lbk lbl lbr lbu lcb lcc lce lcg lcj lck lcl lcr lcu leb lec lee leg lej lek lel ler leu lgb lgc lge lgg lgj lgk lgl lgr lgu lje ljj lju lkb lkg lkl lkr llb llc lle llg llj llk lll llr llu lrb lrc lrg lrk lrr lru lub luc lue lug luk lul lur luu rbb rbc rbe rbg rbk rbl rbr rbu rcb rcc rce rcg rcj rcl rcr rcu re- reb rec ree reg rek rel rer reu rgb rgc rge rgg rgk rgr rjc rjg rjk rjr rkb rkc rke rkg rkk rku rlc rle rlg rll rlr rlu rrb rrc rrg rrk rrl rrr rru rub ruc rue rug ruk rur ruu ubb ubc ube ubg ubk ubl ubr ubu ucb ucc uce ucg ucj uck ucl ucr ucu ueb uec uee ueg uel uer ugb ugc uge ugg ugk ugl ugr ugu ujc ukb ukc uke ukk ukl ukr uku ulb ulc ule ulg ulk ull ulr ulu ur- urb urc ure urg urk url urr uru uuc uue uug uur uuu