-er -ic b-u bbb bbc bbe bbi bbl bbr bbu bcb bcc bce bci bcl bcr bcu bcv be- beb bec bee bei bel ber beu bev bi- bib bic bie bii bil bir biu biv blb blc ble bli bll blr blu blv brb bre bri brl brr bru brv bub buc bue bui bul bur buu bvb bvc bve bvi bvl bvr bvu bvv c-- cbb cbc cbe cbi cbl cbr cbu cbv ccb ccc cce cci ccl ccr ccu ccv ce- ceb cec cee cei cel cer ceu cev ci- cib cic cie cii cil cir ciu civ cl- clb clc cle cli cll clr clu clv crb crc cre cri crl crr cru crv cub cuc cue cui cul cur cuu cuv cvb cvc cve cvi cvl cvr cvu cvv ebb ebc ebe ebi ebl ebr ebu ebv ec- ecb ecc ece eci ecl ecr ecu ecv eeb eec eee eel eer eev eib eic eie eii eil eir eiu eiv elb elc ele eli ell elr elu elv erb erc ere eri erl err eru erv eu- eub euc eue eui eul eur euv evb evc eve evi evl evr evv i-v ibb ibc ibe ibi ibl ibr ibu ibv icb icc ice ici icl icr icu icv ie- iec iee iei iel ier iev iib iic iie iii iil iir iiu il- ilb ilc ile ili ill ilr ilu ilv ir- irb irc ire iri irl irr iru irv iu- iub iuc iue iui iur ivb ivc ive ivi ivl ivr ivu ivv lbb lbc lbe lbi lbl lbr lbu lbv lcb lcc lce lci lcl lcr lcu lcv leb lec lee lei lel ler leu lev lib lic lie lii lil lir liu liv llb llc lle lli lll llr llu llv lrb lrc lri lrr lru lrv lub luc lue lui lul lur luu luv lvb lvc lve lvi lvl lvr lvv rbb rbc rbe rbi rbl rbr rbu rcb rcc rce rci rcl rcr rcu rcv re- reb rec ree rei rel rer reu rev rib ric rie rii ril rir riv rlc rle rli rll rlr rlu rrb rrc rri rrl rrr rru rub ruc rue rui rur ruu ruv rvb rvc rve rvi rvl rvr rvu rvv ubb ubc ube ubi ubl ubr ubu ubv ucb ucc uce uci ucl ucr ucu ucv ueb uec uee uei uel uer uib uic uie uii uil uir uiu ulb ulc ule uli ull ulr ulu ulv ur- urb urc ure uri url urr uru uuc uue uur uuu uvb uvc uve uvl uvu uvv v-e vbc vbi vbl vbr vbv vcc vce vci vcl vcr vcu veb vec vee vei vel ver veu vi- vib vic vie vii vil vir viu viv vl- vlb vlc vle vll vlv vrb vrc vre vri vrr vru vue vul vur vuv vvb vvc vvi vvr vvv