-er -ey bbb bbc bbe bbr bbs bbt bbx bby bcb bcc bce bcr bcs bct bcx bcy be- beb bec bee ber bes bet bex bey brb bre brr brs brt brx bry bsb bsc bse bsr bss bst bsx bsy btb btc bte btr bts btt btx bty bxb bxx by- byc bye byr bys byt c-- cbb cbc cbe cbr cbs cbt cbx cby ccb ccc cce ccr ccs cct ccx ce- ceb cec cee cer ces cet cex cey crb crc cre crr crs crt crx cry csb csc cse csr css cst csx csy ctb ctc cte ctr cts ctt ctx cty cxc cxr cxs cxt cxx cyb cyc cye cyr cys cyt ebb ebc ebe ebr ebs ebt ebx eby ec- ecb ecc ece ecr ecs ect ecx eeb eec eee eer ees eet eex eey erb erc ere err ers ert ery es- esb esc ese esr ess est esx esy etb etc ete etr ets ett etx ety ex- exc exe exr exs ext exx exy eyc eye eyr eys eyt rbb rbc rbe rbr rbs rbt rbx rcb rcc rce rcr rcs rct rcx re- reb rec ree rer res ret rex rey rrb rrc rrr rrs rrt rsb rsc rse rsr rss rst rsx rtb rtc rte rtr rts rtt rtx rty rxr rxs ry- ryc rye ryr rys ryy sbb sbc sbe sbr sbs sbt sbx sby scb scc sce scr scs sct scx se- seb sec see ser ses set sex sey sr- srb src sre srr srs srt srx sry ss- ssb ssc sse ssr sss sst ssx stb stc ste str sts stt stx sty sxc sxs sxt sy- syb syc sye syr sys syt syx t-x tbb tbc tbe tbr tbs tbt tcb tcc tce tcr tcs tct tcx te- teb tec tee ter tes tet tex tey trb trc tre trr trs trt trx try tsb tsc tse tsr tss tst tsx tsy ttb ttc tte ttr tts ttt ttx tty txe txs txt tyc tye tyr tys tyt xbc xbe xbr xbx xcb xcr xcx xee xer xes xet xex xrc xrt xrx xry xsb xsc xss xst xtc xtr xts xtx xty xxx xxy xyr xyy ybc ybe ybr ybs yby ycc yce ycs ycy yeb yec yee yer yes yet yex yey yrc yre yrs yrt ysb ysc yse ysr yss yst ysy ytc yte ytr yts ytt yxe yxy yyb yyc yye yys yyt yyy