MAYBE
195.90/59.91	MAYBE
195.90/59.91	
195.90/59.91	Problem:
195.90/59.91	 a(a(x1)) -> a(b(a(b(a(x1)))))
195.90/59.91	 c(a(x1)) -> a(b(a(a(c(x1)))))
195.90/59.91	 b(b(b(x1))) -> a(b(x1))
195.90/59.91	 c(b(x1)) -> a(a(c(x1)))
195.90/59.91	 c(b(x1)) -> b(a(d(x1)))
195.90/59.91	 d(d(x1)) -> d(b(d(b(d(x1)))))
195.90/59.91	 c(c(x1)) -> c(d(c(x1)))
195.90/59.91	 a(a(a(x1))) -> a(b(b(x1)))
195.90/59.91	
195.90/59.91	Proof:
195.90/59.91	 Open
195.90/59.91	EOF