MAYBE
874.90/221.07	MAYBE
874.90/221.07	
874.90/221.07	Problem:
874.90/221.07	 a12(a12(a12(a12(x1)))) -> x1
874.90/221.07	 a13(a13(a13(a13(x1)))) -> x1
874.90/221.07	 a14(a14(a14(a14(x1)))) -> x1
874.90/221.07	 a15(a15(a15(a15(x1)))) -> x1
874.90/221.07	 a16(a16(a16(a16(x1)))) -> x1
874.90/221.07	 a23(a23(a23(a23(x1)))) -> x1
874.90/221.07	 a24(a24(a24(a24(x1)))) -> x1
874.90/221.07	 a25(a25(a25(a25(x1)))) -> x1
874.90/221.07	 a26(a26(a26(a26(x1)))) -> x1
874.90/221.07	 a34(a34(a34(a34(x1)))) -> x1
874.90/221.07	 a35(a35(a35(a35(x1)))) -> x1
874.90/221.07	 a36(a36(a36(a36(x1)))) -> x1
874.90/221.07	 a45(a45(a45(a45(x1)))) -> x1
874.90/221.07	 a46(a46(a46(a46(x1)))) -> x1
874.90/221.07	 a56(a56(a56(a56(x1)))) -> x1
874.90/221.07	 a13(a13(x1)) -> a12(a12(a23(a23(a12(a12(x1))))))
874.90/221.07	 a14(a14(x1)) -> a12(a12(a23(a23(a34(a34(a23(a23(a12(a12(x1))))))))))
874.90/221.07	 a15(a15(x1)) -> a12(a12(a23(a23(a34(a34(a45(a45(a34(a34(a23(a23(a12(a12(x1))))))))))))))
874.90/221.07	 a16(a16(x1)) ->
874.90/221.07	 a12(a12(a23(a23(a34(a34(a45(a45(a56(a56(a45(a45(a34(a34(a23(a23(a12(a12(x1))))))))))))))))))
874.90/221.07	 a24(a24(x1)) -> a23(a23(a34(a34(a23(a23(x1))))))
874.90/221.07	 a25(a25(x1)) -> a23(a23(a34(a34(a45(a45(a34(a34(a23(a23(x1))))))))))
874.90/221.07	 a26(a26(x1)) -> a23(a23(a34(a34(a45(a45(a56(a56(a45(a45(a34(a34(a23(a23(x1))))))))))))))
874.90/221.07	 a35(a35(x1)) -> a34(a34(a45(a45(a34(a34(x1))))))
874.90/221.07	 a36(a36(x1)) -> a34(a34(a45(a45(a56(a56(a45(a45(a34(a34(x1))))))))))
874.90/221.07	 a46(a46(x1)) -> a45(a45(a56(a56(a45(a45(x1))))))
874.90/221.07	 a12(a12(a23(a23(a12(a12(a23(a23(a12(a12(a23(a23(x1)))))))))))) -> x1
874.90/221.07	 a23(a23(a34(a34(a23(a23(a34(a34(a23(a23(a34(a34(x1)))))))))))) -> x1
874.90/221.07	 a34(a34(a45(a45(a34(a34(a45(a45(a34(a34(a45(a45(x1)))))))))))) -> x1
874.90/221.07	 a45(a45(a56(a56(a45(a45(a56(a56(a45(a45(a56(a56(x1)))))))))))) -> x1
874.90/221.07	 a12(a12(a34(a34(x1)))) -> a34(a34(a12(a12(x1))))
874.90/221.07	 a12(a12(a45(a45(x1)))) -> a45(a45(a12(a12(x1))))
874.90/221.07	 a12(a12(a56(a56(x1)))) -> a56(a56(a12(a12(x1))))
874.90/221.07	 a23(a23(a45(a45(x1)))) -> a45(a45(a23(a23(x1))))
874.90/221.07	 a23(a23(a56(a56(x1)))) -> a56(a56(a23(a23(x1))))
874.90/221.07	 a34(a34(a56(a56(x1)))) -> a56(a56(a34(a34(x1))))
874.90/221.07	
874.90/221.07	Proof:
874.90/221.07	 Open
874.90/221.08	EOF