-er -ic bbb bbc bbe bbi bbk bbl bbr bcb bcc bce bci bck bcl bcr bcv be- beb bec bee bei bek bel ber bev bi- bib bic bie bii bik bil bir biv bkb bkc bke bkk bkl bkr bkv blb blc ble bli blk bll blr blv brb bre bri brk brl brr brv bvb bvc bve bvi bvk bvl bvr bvv c-- cbb cbc cbe cbi cbk cbl cbr cbv ccb ccc cce cci cck ccl ccr ccv ce- ceb cec cee cei cek cel cer cev ci- cib cic cie cii cik cil cir civ ckb ckc cki cl- clb clc cle cli clk cll clr clv crb crc cre cri crk crl crr crv cvb cvc cve cvi cvk cvl cvr cvv ebb ebc ebe ebi ebk ebl ebr ebv ec- ecb ecc ece eci eck ecl ecr ecv eeb eec eee eek eel eer eev eib eic eie eii eik eil eir eiv ekb ekc eke eki ekl ekr ekv elb elc ele eli elk ell elr elv erb erc ere eri erk erl err erv evb evc eve evi evl evr evv i-v ibb ibc ibe ibi ibk ibl ibr ibv icb icc ice ici ick icl icr icv ie- iec iee iei iek iel ier iev iib iic iie iii iil iir ikb ikc ike iki ikk ikl ikr ikv il- ilb ilc ile ili ilk ill ilr ilv ir- irb irc ire iri irk irl irr irv ivb ivc ive ivi ivl ivr ivv kbb kbc kbe kbi kbk kbl kbr kcb kcc kce kci kck kcl kcr ke- keb kec kee kei kek kel ker kev kib kic kie kii kik kil kir kiv kkb kkc kke kki kkk kkl kkr kkv kl- klb klc kli klr klv krc kri krk krl krr krv kvb kvi kvk kvr kvv lbb lbc lbe lbi lbk lbl lbr lbv lcb lcc lce lci lck lcl lcr lcv leb lec lee lei lek lel ler lev lib lic lie lii lik lil lir liv lkb lkl lkr llb llc lle lli llk lll llr llv lrb lrc lri lrk lrr lrv lvb lvc lve lvi lvl lvr lvv rbb rbc rbe rbi rbk rbl rbr rcb rcc rce rci rcl rcr rcv re- reb rec ree rei rek rel rer rev rib ric rie rii rik ril rir riv rkb rkc rke rkk rkv rlc rle rli rll rlr rrb rrc rri rrk rrl rrr rvb rvc rve rvi rvl rvr rvv v-e vbc vbi vbk vbl vbr vbv vcc vce vci vcl vcr veb vec vee vei vek vel ver vi- vib vic vie vii vik vil vir viv vkb vl- vlb vlc vle vlk vll vlv vrb vrc vre vri vrk vrr vvb vvc vvi vvr vvv