cccc cccp ccee ccpe ccpp cctc cctt cec- cece cecp cect ceec cepc cepe cepp cept cet- cete cetp cpce cpep cptp ctcp ctec ctep ctpp cyc- cycc cypc cyt- cyte cyy- cyyc eccc ecce ecct ecpp ect- ectc eeee eetc eete epcc epec epee eppc eppp eppy epte etcc etec etee ette etty eyec eyet eyey eype eyte pccc pcce pcep pcpp pcte pece pect pecy peec peep peet pepe pete pett pety ppcc pppp pptt ppye ptcc pttc pyce pyep pyet pype pypy pyte pytt tccc tcep tcpy tctc tect teec teet tepe tepp tete tett teye tpcp tppp tpte tptp ttcp tttt tyce tyee tyet typ- type typp typy tyte tytt tyty yccc ycee yctc yeep yeet yepe yepp yete yett yeye ypcc yyyy