-er -ic bbb bbc bbe bbg bbi bbk bbl bbr bcb bcc bce bcg bci bck bcl bcr be- beb bec bee beg bei bek bel ber bgb bgc bge bgg bgi bgk bgl bgr bi- bib bic bie big bii bik bil bir bkb bkc bke bkg bkk bkl bkr blb blc ble blg bli blk bll blr brb bre brg bri brk brl brr c-- cbb cbc cbe cbg cbi cbk cbl cbr ccb ccc cce ccg cci cck ccl ccr ce- ceb cec cee ceg cei cek cel cer cgb cgc cge cgg cgi cgl cgr ci- cib cic cie cig cii cik cil cir ckb ckc cki cl- clb clc cle clg cli clk cll clr crb crc cre crg cri crk crl crr ebb ebc ebe ebg ebi ebk ebl ebr ec- ecb ecc ece ecg eci eck ecl ecr eeb eec eee eeg eek eel eer egb egc ege egg egi egl egr eib eic eie eig eii eik eil eir ekb ekc eke ekg eki ekl ekr elb elc ele elg eli elk ell elr erb erc ere erg eri erk erl err gbc gbe gbg gbi gbk gbl gbr gcb gcc gce gcg gci gck gcl gcr ge- geb gec gee geg gei gek gel ger ggb ggc ggg ggi ggr gib gic gie gig gii gik gil gir gkb glb glc gle glg gli glk gll glr grb grc gre grg gri grk grl grr ibb ibc ibe ibg ibi ibk ibl ibr icb icc ice icg ici ick icl icr ie- iec iee ieg iei iek iel ier igb igc ige igg igi igk igl igr iib iic iie iii iil iir ikb ikc ike iki ikk ikl ikr il- ilb ilc ile ilg ili ilk ill ilr ir- irb irc ire irg iri irk irl irr kbb kbc kbe kbi kbk kbl kbr kcb kcc kce kcg kci kck kcl kcr ke- keb kec kee keg kei kek kel ker kgb kgc kgi kgl kib kic kie kig kii kik kil kir kkb kkc kke kki kkk kkl kkr kl- klb klc klg kli klr krc krg kri krk krl krr lbb lbc lbe lbg lbi lbk lbl lbr lcb lcc lce lcg lci lck lcl lcr leb lec lee leg lei lek lel ler lgb lgc lge lgg lgi lgk lgl lgr lib lic lie lig lii lik lil lir lkb lkg lkl lkr llb llc lle llg lli llk lll llr lrb lrc lrg lri lrk lrr rbb rbc rbe rbg rbi rbk rbl rbr rcb rcc rce rcg rci rcl rcr re- reb rec ree reg rei rek rel rer rgb rgc rge rgg rgi rgk rgr rib ric rie rig rii rik ril rir rkb rkc rke rkg rkk rlc rle rlg rli rll rlr rrb rrc rrg rri rrk rrl rrr