MAYBE
239.91/59.22	MAYBE
239.91/59.22	
239.91/59.22	Problem:
239.91/59.22	 active(__(__(X,Y),Z)) -> mark(__(X,__(Y,Z)))
239.91/59.22	 active(__(X,nil())) -> mark(X)
239.91/59.22	 active(__(nil(),X)) -> mark(X)
239.91/59.22	 active(and(tt(),X)) -> mark(X)
239.91/59.22	 active(isNePal(__(I,__(P,I)))) -> mark(tt())
239.91/59.22	 mark(__(X1,X2)) -> active(__(mark(X1),mark(X2)))
239.91/59.22	 mark(nil()) -> active(nil())
239.91/59.22	 mark(and(X1,X2)) -> active(and(mark(X1),X2))
239.91/59.22	 mark(tt()) -> active(tt())
239.91/59.22	 mark(isNePal(X)) -> active(isNePal(mark(X)))
239.91/59.22	 __(mark(X1),X2) -> __(X1,X2)
239.91/59.22	 __(X1,mark(X2)) -> __(X1,X2)
239.91/59.22	 __(active(X1),X2) -> __(X1,X2)
239.91/59.22	 __(X1,active(X2)) -> __(X1,X2)
239.91/59.22	 and(mark(X1),X2) -> and(X1,X2)
239.91/59.22	 and(X1,mark(X2)) -> and(X1,X2)
239.91/59.22	 and(active(X1),X2) -> and(X1,X2)
239.91/59.22	 and(X1,active(X2)) -> and(X1,X2)
239.91/59.22	 isNePal(mark(X)) -> isNePal(X)
239.91/59.22	 isNePal(active(X)) -> isNePal(X)
239.91/59.22	
239.91/59.22	Proof:
239.91/59.22	 Open
239.91/59.22	EOF