cccc cccf ccci ccfc ccff ccfi ccgc ccgt ccic ccii ccoc cctc cctt cfcf cfco cfcy cfgo cfit cftc cgcc cgcg cgfc cicc cici cico cict ciff cifg cigi ciii ciit citf citg citi cito citt city coco coct cofc coff cofi coft cogi cogo coif coit coof coot cotc coti coto cott coty coyf coyo coyt ctcf ctfc ctfo ctgf ctic ctot cyc- cycc cyfi cyft cyt- cyto cyy- cyyc fccf fcic fcii fcot fcto fcty ffcc ffff ffii fftf ficc fico fict fifc fiff fifi fifo fift figc figg figo fiii fitc fiti fitt foci foco fofo fogg fogi fogo fogy foof foot foti foto fott foty foyt ft-c ftfc ftfy ftii fyfi fyti gc-c gccc gccf gcfc gcic gcii gctc gfcf gfci ggfg gggg giff gift gigg gigi gigo giog gioi gito goff gogi gogo goif goit goof goog gooi goot goti goto gott goty goyf goyt gtco gtfc gtfo gytt i-go iccc iccf icci icco icct icgc icoc ifco iffy ific ifit ifto ifyo igcc igfc iggy igoo igot iiii iiio iiit iioi iioo iitt iocg ioci iofc iogt ioii ioio ioit ioof iooi iooo iotf ioto itgc itgo itic itif itof itoi itoo ittf itto itty occc occi occt oct- octi octo octy off- offc offo offy ofgo ofit ogfy oggi oggy ogog ogoi oici oigo oiii oitc oiti ooff oofy oooo ooty otfc otic otif otit oto- otof otog otoo otoy otti otto otyg tccc tcfc tcfg tctc tfot tftc tgcc tgif tgtc ticc tico tiff tifo tift tigi tigy tiit titc titi tito titt tiyi tiyo to-y toci toco toff tofi tofo toft togo togt toit toof toot totc toti toto tott toty toyo toyt ttfc ttff ttoy tttt tyco tyff tyft tyti tyto tytt tyty yccc yctc ygot yiff yift yiti yoff yogi yogo yoit yoof yoot yott yoyo yyff yyyy