Input TRS:
    1: ++(nil(),y) -> y
    2: ++(x,nil()) -> x
    3: ++(.(x,y),z) -> .(x,++(y,z))
    4: ++(++(x,y),z) -> ++(x,++(y,z))
Number of Rules: 4
Direct POLO(Sum) ... removes: 2 1
	I(.) = x1 + x2
	I(nil) = 0
	I(++) = x1 + x2 + 1
Number of Rules: 2
Direct POLO(Sum) ...Direct QLPOS ... removes: 4 3
	sigma(.) = [1,2]
	sigma(++) = [1,2]
    PREC: ++ > .
Number of Rules: 0