bbbb bbbs bbeb bbrc bcbc bcbs bccc bccs bcec bcer bces bcrs bcsc bcss bebb bebe beby becs beeb beer bees beey berc bere berr bers bery bes- bese bess besy beye beys brcb brce breb brec bree brer bres brex brey brrr brrs brsb brsr bry- brye bscs bseb bsec bsee bser bses bssc bsse byce byer byes byre bysb byse byss bysy cbbc cbbs cbcc cbce cbcr cbcs cbec cbee cber cbre cbry cbsc cbse ccbc cccb cccc cccs ccee ccrc ccre ccrs ccss cebs cec- cece cecs ceeb ceec cees cer- cerc cere cers cery cesc cese cesr cess cexe ceys ceyx crbc crcc crce crcr cre- creb crec cree cres crex crss cry- cryb crys cscb cscc csce cscr cscs csec csee cser csrc csrs csse cssr csys cxxx cybb cybc cyc- cycb cycc cycs cyre cyrs cyse cyy- cyyc ebbc ebbr ebbs ebby ebcc eber ebes ecbc ecbe eccb eccc ecce eces ecrc ecrr ecsc ecse ecss eeby eecs eeee eees eerc eers eery eese eesy er-x erbb erbe ercc erce ereb erec erer eres errc erre errs erse eryc erye eryx esbs escb esce escr escs esee eser eses esse essy exec exer exes exrx exxy eyeb eyec eyer eyes eyey eyre eyry eyse eyyr rbbb rbbr rbbs rbss rcbc rccb rccc rccs rcsc rcss rcyc rebb rebe rebs recc rece recr recs recy reeb rees rere rers rery rese ress rexx reye reys rrrr rscc rscs rscy rsee rsre rxes rybe ryeb ryes rysy sbbs sbcc sbcs sber sbse sccc scce sccs sccy scec scee scer scey scr- scrc scre scrs scry scsc scsr scye se-c se-e se-s se-x se-y sebe sebs seby sec- secc sece secr secs secy seeb seec seer sees seex seey serb serc sere serr sers sery sesc sese sess sex- sexe sexy seye seys srbc srby srcc sreb srec sres ssbr ssby sscc ssce sscs ssec ssee sses ssex ssrc ssrs sssb sssc ssss syce sycr syer syes syre syrs syry syse syss syxe xbee xces xeer xer- xers xexe xxxx xxxy xyr- ybbs yber ybry yccc ycee ycsb yeer yees yerb yere yerr yers yery yess yeye yeyr ysby ysee yser yses ysse ysyb yyyy