-er -ic bbb bbc bbe bbi bbl bbr bbs bbt bcb bcc bce bci bcl bcr bcs bct be- beb bec bee bei bel ber bes bet bi- bib bic bie bii bil bir bis bit blb blc ble bli bll blr bls blt brb bre bri brl brr brs brt bsb bsc bse bsi bsl bsr bss bst btb btc bte bti btl btr bts btt c-- cbb cbc cbe cbi cbl cbr cbs cbt ccb ccc cce cci ccl ccr ccs cct ce- ceb cec cee cei cel cer ces cet ci- cib cic cie cii cil cir cis cit cl- clb clc cle cli cll clr cls clt crb crc cre cri crl crr crs crt csb csc cse csi csl csr css cst ctb ctc cte cti ctl ctr cts ctt ebb ebc ebe ebi ebl ebr ebs ebt ec- ecb ecc ece eci ecl ecr ecs ect eeb eec eee eel eer ees eet eib eic eie eii eil eir eis eit elb elc ele eli ell elr els elt erb erc ere eri erl err ers ert es- esb esc ese esi esl esr ess est etb etc ete eti etl etr ets ett ibb ibc ibe ibi ibl ibr ibs ibt icb icc ice ici icl icr ics ict ie- iec iee iei iel ier ies iet iib iic iie iii iil iir iis iit il- ilb ilc ile ili ill ilr ils ilt ir- irb irc ire iri irl irr irs irt is- isb isc ise isi isl isr iss ist itb itc ite iti itl its itt lbb lbc lbe lbi lbl lbr lbs lbt lcb lcc lce lci lcl lcr lcs lct leb lec lee lei lel ler les let lib lic lie lii lil lir lis lit llb llc lle lli lll llr lls llt lrb lrc lri lrr lrs lrt lsb lsc lse lsi lsl lsr lss lst ltb ltc lte lti ltl ltr lts ltt rbb rbc rbe rbi rbl rbr rbs rbt rcb rcc rce rci rcl rcr rcs rct re- reb rec ree rei rel rer res ret rib ric rie rii ril rir ris rit rlc rle rli rll rlr rls rlt rrb rrc rri rrl rrr rrs rrt rsb rsc rse rsi rsl rsr rss rst rtb rtc rte rti rtl rtr rts rtt sbb sbc sbe sbi sbl sbr sbs sbt scb scc sce sci scl scr scs sct se- seb sec see sei sel ser ses set sib sic sie sii sil sir sis sit slb slc sle sli sll slr sls slt sr- srb src sre sri srl srr srs srt ss- ssb ssc sse ssi ssl ssr sss sst stb stc ste sti stl str sts stt tbb tbc tbe tbi tbl tbr tbs tbt tcb tcc tce tci tcl tcr tcs tct te- teb tec tee tei tel ter tes tet tib tic tie tii til tir tis tit tlc tle tli tll tlr tls tlt trb trc tre tri trl trr trs trt tsb tsc tse tsi tsl tsr tss tst ttb ttc tte tti ttl ttr tts ttt