yappy ayppy ypapy pyapy apypy paypy yappy ayppy ypapy pyapy apypy paypy yppay pypay yppay pypay ppyay ppyay appyy papyy appyy papyy ppayy ppayy yapyp aypyp ypayp pyayp apyyp payyp yaypp ayypp yyapp yyapp ayypp yaypp ypyap pyyap yypap yypap pyyap ypyap apyyp payyp aypyp yapyp pyayp ypayp yapyp aypyp ypayp pyayp apyyp payyp yaypp ayypp yyapp yyapp ayypp yaypp ypyap pyyap yypap yypap pyyap ypyap apyyp payyp aypyp yapyp pyayp ypayp yppya pypya yppya pypya ppyya ppyya ypypa pyypa yyppa yyppa pyypa ypypa ypypa pyypa yyppa yyppa pyypa ypypa ppyya ppyya pypya yppya pypya yppya appyy papyy appyy papyy ppayy ppayy apypy paypy ayppy yappy pyapy ypapy apypy paypy ayppy yappy pyapy ypapy ppyay ppyay pypay yppay pypay yppay
Note: these 'words' (valid or invalid) are all the permutations of the word yappy. These words are obtained by scrambling the letters in yappy.