coypu ocypu cyopu ycopu oycpu yocpu copyu ocpyu cpoyu pcoyu opcyu pocyu cypou ycpou cpyou pcyou ypcou pycou oypcu yopcu opycu poycu ypocu pyocu coyup ocyup cyoup ycoup oycup yocup couyp ocuyp cuoyp ucoyp oucyp uocyp cyuop ycuop cuyop ucyop yucop uycop oyucp youcp ouycp uoycp yuocp uyocp copuy ocpuy cpouy pcouy opcuy pocuy coupy ocupy cuopy ucopy oucpy uocpy cpuoy pcuoy cupoy ucpoy pucoy upcoy opucy poucy oupcy uopcy puocy upocy cypuo ycpuo cpyuo pcyuo ypcuo pycuo cyupo ycupo cuypo ucypo yucpo uycpo cpuyo pcuyo cupyo ucpyo pucyo upcyo ypuco pyuco yupco uypco puyco upyco oypuc yopuc opyuc poyuc ypouc pyouc oyupc youpc ouypc uoypc yuopc uyopc opuyc pouyc oupyc uopyc puoyc upoyc ypuoc pyuoc yupoc uypoc puyoc upyoc
Note: these 'words' (valid or invalid) are all the permutations of the word coypu. These words are obtained by scrambling the letters in coypu.