-er -ic bbb bbc bbe bbi bbl bbr bbt bcb bcc bce bci bcl bcr bct bcv be- beb bec bee bei bel ber bet bev bi- bib bic bie bii bil bir bit biv blb blc ble bli bll blr blt blv brb bre bri brl brr brt brv btb btc bte bti btl btr btt btv bvb bvc bve bvi bvl bvr bvt bvv c-- cbb cbc cbe cbi cbl cbr cbt cbv ccb ccc cce cci ccl ccr cct ccv ce- ceb cec cee cei cel cer cet cev ci- cib cic cie cii cil cir cit civ cl- clb clc cle cli cll clr clt clv crb crc cre cri crl crr crt crv ctb ctc cte cti ctl ctr ctt ctv cvb cvc cve cvi cvl cvr cvt cvv ebb ebc ebe ebi ebl ebr ebt ebv ec- ecb ecc ece eci ecl ecr ect ecv eeb eec eee eel eer eet eev eib eic eie eii eil eir eit eiv elb elc ele eli ell elr elt elv erb erc ere eri erl err ert erv etb etc ete eti etl etr ett etv evb evc eve evi evl evr evt evv i-v ibb ibc ibe ibi ibl ibr ibt ibv icb icc ice ici icl icr ict icv ie- iec iee iei iel ier iet iev iib iic iie iii iil iir iit il- ilb ilc ile ili ill ilr ilt ilv ir- irb irc ire iri irl irr irt irv itb itc ite iti itl itt itv ivb ivc ive ivi ivl ivr ivt ivv lbb lbc lbe lbi lbl lbr lbt lbv lcb lcc lce lci lcl lcr lct lcv leb lec lee lei lel ler let lev lib lic lie lii lil lir lit liv llb llc lle lli lll llr llt llv lrb lrc lri lrr lrt lrv ltb ltc lte lti ltl ltr ltt ltv lvb lvc lve lvi lvl lvr lvt lvv rbb rbc rbe rbi rbl rbr rbt rcb rcc rce rci rcl rcr rct rcv re- reb rec ree rei rel rer ret rev rib ric rie rii ril rir rit riv rlc rle rli rll rlr rlt rrb rrc rri rrl rrr rrt rtb rtc rte rti rtl rtr rtt rtv rvb rvc rve rvi rvl rvr rvt rvv tbb tbc tbe tbi tbl tbr tbt tbv tcb tcc tce tci tcl tcr tct tcv te- teb tec tee tei tel ter tet tev tib tic tie tii til tir tit tiv tlc tle tli tll tlr tlt tlv trb trc tre tri trl trr trt trv ttb ttc tte tti ttl ttr ttt ttv tvb tvc tve tvi tvl tvr tvt v-e vbc vbi vbl vbr vbv vcc vce vci vcl vcr vct veb vec vee vei vel ver vet vi- vib vic vie vii vil vir vit viv vl- vlb vlc vle vll vlt vlv vrb vrc vre vri vrr vrt vtb vtc vte vti vtl vtr vtt vtv vvb vvc vvi vvr vvt vvv