Input TRS:
    1: fst(0(),Z) -> nil()
    2: fst(s(),cons(Y)) -> cons(Y)
    3: from(X) -> cons(X)
    4: add(0(),X) -> X
    5: add(s(),Y) -> s()
    6: len(nil()) -> 0()
    7: len(cons(X)) -> s()
Number of Rules: 7
Direct POLO(mPol) ... orients all.
	I(0) = 2
	I(len) = 2 * x1 + 3
	I(from) = 3 * x1 + 1
	I(nil) = 0
	I(s) = 2
	I(add) = 3 * x1 + 2 * x2 + 2
	I(cons) = x1
	I(fst) = 3 * x1 + 3 * x2 + 3
Number of Rules: 0