MAYBE
235.81/59.85	MAYBE
235.81/59.85	
235.81/59.85	Problem:
235.81/59.85	 active(and(tt(),X)) -> mark(X)
235.81/59.85	 active(plus(N,0())) -> mark(N)
235.81/59.85	 active(plus(N,s(M))) -> mark(s(plus(N,M)))
235.81/59.85	 mark(and(X1,X2)) -> active(and(mark(X1),X2))
235.81/59.85	 mark(tt()) -> active(tt())
235.81/59.85	 mark(plus(X1,X2)) -> active(plus(mark(X1),mark(X2)))
235.81/59.85	 mark(0()) -> active(0())
235.81/59.85	 mark(s(X)) -> active(s(mark(X)))
235.81/59.85	 and(mark(X1),X2) -> and(X1,X2)
235.81/59.85	 and(X1,mark(X2)) -> and(X1,X2)
235.81/59.85	 and(active(X1),X2) -> and(X1,X2)
235.81/59.85	 and(X1,active(X2)) -> and(X1,X2)
235.81/59.85	 plus(mark(X1),X2) -> plus(X1,X2)
235.81/59.85	 plus(X1,mark(X2)) -> plus(X1,X2)
235.81/59.85	 plus(active(X1),X2) -> plus(X1,X2)
235.81/59.85	 plus(X1,active(X2)) -> plus(X1,X2)
235.81/59.85	 s(mark(X)) -> s(X)
235.81/59.85	 s(active(X)) -> s(X)
235.81/59.85	
235.81/59.85	Proof:
235.81/59.85	 Open
235.81/59.85	EOF