-er -ic b-u bbb bbc bbe bbi bbl bbq bbr bbt bbu bcb bcc bce bci bcl bcq bcr bct bcu be- beb bec bee bei bel beq ber bet beu bi- bib bic bie bii bil bir bit biu blb blc ble bli bll blq blr blt blu bqc bqe bqt brb bre bri brl brq brr brt bru btb btc bte bti btl btq btr btt btu bub buc bue bui bul bur but buu c-- cbb cbc cbe cbi cbl cbq cbr cbt cbu ccb ccc cce cci ccl ccr cct ccu ce- ceb cec cee cei cel ceq cer cet ceu ci- cib cic cie cii cil ciq cir cit ciu cl- clb clc cle cli cll clr clt clu cqb cqc cqi cql cqt crb crc cre cri crl crq crr crt cru ctb ctc cte cti ctl ctq ctr ctt ctu cub cuc cue cui cul cuq cur cut cuu ebb ebc ebe ebi ebl ebq ebr ebt ebu ec- ecb ecc ece eci ecl ecq ecr ect ecu eeb eec eee eel eer eet eib eic eie eii eil eir eit eiu elb elc ele eli ell elr elt elu eqe eqq eqt equ erb erc ere eri erl erq err ert eru etb etc ete eti etl etr ett etu eu- eub euc eue eui eul eur eut ibb ibc ibe ibi ibl ibr ibt ibu icb icc ice ici icl icq icr ict icu ie- iec iee iei iel ier iet iib iic iie iii iil iir iit iiu il- ilb ilc ile ili ill ilq ilr ilt ilu iqc iqe iqt iqu ir- irb irc ire iri irl irq irr irt iru itb itc ite iti itl itq itt itu iu- iub iuc iue iui iur iut lbb lbc lbe lbi lbl lbr lbt lbu lcb lcc lce lci lcl lcq lcr lct lcu leb lec lee lei lel leq ler let leu lib lic lie lii lil liq lir lit liu llb llc lle lli lll llq llr llt llu lqr lrb lrc lri lrr lrt lru ltb ltc lte lti ltl ltr ltt ltu lub luc lue lui lul lur lut luu qbc qbe qbq qcc qci qcl qct qec qee qet qic qie qil qir qit qiu qqq qqu qrb qrc qre qri qrl qrt qru qtc qti qtq qtr qu- que qui qul qur qut rbb rbc rbe rbi rbl rbr rbt rbu rcb rcc rce rci rcl rcr rct rcu re- reb rec ree rei rel req rer ret reu rib ric rie rii ril riq rir rit rlc rle rli rll rlr rlt rlu rqc rrb rrc rri rrl rrq rrr rrt rru rtb rtc rte rti rtl rtq rtr rtt rtu rub ruc rue rui rur rut ruu tbb tbc tbe tbi tbl tbr tbt tbu tcb tcc tce tci tcl tcr tct tcu te- teb tec tee tei tel teq ter tet teu tib tic tie tii til tir tit tiu tlc tle tli tll tlr tlt tlu trb trc tre tri trl trq trr trt tru ttb ttc tte tti ttl ttr ttt ttu tub tuc tue tui tul tur tut tuu ubb ubc ube ubi ubl ubr ubt ubu ucb ucc uce uci ucl ucr uct ucu ueb uec uee uei uel uer uet uib uic uie uii uil uiq uir uit uiu ulb ulc ule uli ull ulr ult ulu ur- urb urc ure uri url urr urt uru utb utc ute uti utl utr utt utu uuc uue uur uut uuu