cccc cccf ccfc ccff ccgc ccoc ccrc ccrf ccrg cfcf cfco cffr cfgo cfor cfrg cgcc cgcg cgfc cgro ckck ckco ckfr ckgo ckoc ckoo ckor ckrc cock coco cofc coff cogo cok- coko coof cook cor- corc corf corg cork coro corr crcc crcr crfc crkc croc crok croo cror f--k fccf ffcc ffff ffrr fock foco fofo fogg fogo foof fook for- forg fork foro forr frcc frfc frog gc-c gccc gccf gcfc gcrg gfcf gfor ggfg gggg gocr goff gofr gogo goof goog gook goor gorf gorg goro gorr grcc groc grof grog grok groo gror grrr kccc kcck kccr kcfc kcfg kcfo kcgc kcgf kcgr kckc kckf kckk kcko kckr kcof kcog kcor kcrc kcrg kcro kcrr kfcf kfco kfcr kfff kffg kffk kfgo kfgr kfog kfok kfoo kfor kfrc kfrg kfro kfrr kgcc kgcr kgff kgfk kggf kggg kggo kggr kgor kgrc kgrg kgrk kgro kgrr kkck kkco kkcr kkfg kkfr kkgo kkgr kkkk kkoo kkor kkrc kkrf kkrk kkro kkrr kocf kock kofc koff kofg kofk kofo kogg kogo kokc kokf kokk koko kokr kooc koog kook kooo koor korc korf korg kork koro korr krcc krcg krco krfc krff krfg krfo krkc krkk krko krkr kroc krof krog krok kroo kror krrc krrf krrg krrk krro krrr occc ocro ocrr ofcr off- offc offo offr ofgo ofor ogfr ogog ogro okgo okko okok okor okro oocr ooff oooo orco orff orgo orko oro- orof orok oror orro rccc rcfc rcgc rcrg rffc rkkf rocc rock roco rofc roff rofo rogg rogo rokk roko rokr roof roog rook roor rorc rork roro rrfc rrrr