Input TRS:
    1: d(x) -> e(u(x))
    2: d(u(x)) -> c(x)
    3: c(u(x)) -> b(x)
    4: v(e(x)) -> x
    5: b(u(x)) -> a(e(x))
Number of Rules: 5
Direct POLO(Sum) ... removes: 5 4 3 2 1
	I(a) = x1
	I(b) = x1 + 1
	I(c) = x1 + 2
	I(d) = x1 + 3
	I(e) = x1
	I(u) = x1
	I(v) = x1 + 1
Number of Rules: 0