cccc cccf ccee ccfc ccff cche cchr ccrc ccre ccrf cec- cece ceec cef- cefc cer- cerc cere cerf cfcf cffr cfre chce chch chec chee chef cheh cher chfc chfr chrc chrf chrr crcc crce crcr cre- crec cree creh crfc eccc ecce ecef ecfc ecfr eche ecrc ecrf ecrr eeee eefe eerc ehcc eheh eher ehre ercc erce erch erec erer erfc erhc errc erre fccf fcch fece fech feer fefc fefe feff fehr ferc fere ferr ffcc ffee ffff ffrr frcc free frfc hccc hcch hcfc hech heef heer hefe hehe herc here herr hfce hhhh hree hrfc hrrc rccc rcfc recc rece rech recr reef refe reff refr rehe rere rfef rffc rhce rhee rrfc rrrr