(VAR x1 )
(RULES 
        0(4(x1)) -> 0(1(4(2(3(3(x1))))))
        0(4(x1)) -> 0(2(1(4(3(4(x1))))))
        0(0(4(x1))) -> 1(1(5(2(3(4(x1))))))
        0(1(1(x1))) -> 0(2(2(1(1(1(x1))))))
        0(1(3(x1))) -> 0(2(4(3(4(4(x1))))))
        0(2(4(x1))) -> 1(5(4(3(4(4(x1))))))
        0(4(0(x1))) -> 0(1(2(1(0(3(x1))))))
        1(2(3(x1))) -> 5(1(4(1(4(4(x1))))))
        1(3(3(x1))) -> 0(2(1(1(0(5(x1))))))
        1(3(3(x1))) -> 5(4(0(3(2(3(x1))))))
        1(3(5(x1))) -> 1(1(4(3(3(2(x1))))))
        2(0(0(x1))) -> 2(4(3(4(4(4(x1))))))
        2(0(1(x1))) -> 2(1(5(1(0(1(x1))))))
        2(0(1(x1))) -> 2(4(3(5(2(3(x1))))))
        2(0(4(x1))) -> 2(0(2(1(4(3(x1))))))
        2(0(4(x1))) -> 2(4(1(4(3(1(x1))))))
        3(0(1(x1))) -> 3(1(4(3(4(1(x1))))))
        3(0(5(x1))) -> 3(1(0(2(3(2(x1))))))
        4(0(0(x1))) -> 2(5(2(1(1(1(x1))))))
        4(0(5(x1))) -> 4(1(4(5(1(4(x1))))))
        4(0(5(x1))) -> 4(2(1(4(3(5(x1))))))
        5(0(2(x1))) -> 1(5(2(1(0(2(x1))))))
        5(0(4(x1))) -> 1(0(3(2(4(4(x1))))))
        5(0(4(x1))) -> 1(5(1(0(3(4(x1))))))
        
)