bbbb bbbs bbeb bbrc bcbc bcbs bccc bccs bcec bcer bces bcrs bcsc bcss bebb bebe becs beeb beer bees berc bere berr bers bes- bese bess brcb brce breb brec bree brer bres brrr brrs brsb brsr bscs bseb bsec bsee bser bses bssc bsse cbbc cbbs cbcc cbce cbcr cbcs cbec cbee cber cbre cbsc cbse ccbc cccb cccc cccs ccee ccrc ccre ccrs ccss cebs cec- cece cecs ceeb ceec cees cer- cerc cere cers cesc cese cesr cess crbc crcc crce crcr cre- creb crec cree cres crss cscb cscc csce cscr cscs csec csee cser csrc csrs csse cssr ebbc ebbr ebbs ebcc eber ebes ecbc ecbe eccb eccc ecce eces ecrc ecrr ecsc ecse ecss eecs eeee eees eerc eers eese erbb erbe ercc erce ereb erec erer eres errc erre errs erse esbs escb esce escr escs esee eser eses esse rbbb rbbr rbbs rbss rcbc rccb rccc rccs rcsc rcss rebb rebe rebs recc rece recr recs reeb rees rere rers rese ress rrrr rscc rscs rsee rsre sbbs sbcc sbcs sber sbse sccc scce sccs scec scee scer scr- scrc scre scrs scsc scsr se-c se-e se-s sebe sebs sec- secc sece secr secs seeb seec seer sees serb serc sere serr sers sesc sese sess srbc srcc sreb srec sres ssbr sscc ssce sscs ssec ssee sses ssrc ssrs sssb sssc ssss