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 QWPOS(Sum) ... orients all.
	I(0) = 1
	I(len) = x1 + 2	sigma(len) = [1]
	I(from) = x1 + 1	sigma(from) = [1]
	I(nil) = 2
	I(s) = 2
	I(add) = x1 + x2	sigma(add) = [1,2]
	I(cons) = x1	sigma(cons) = [1]
	I(fst) = x1 + x2 + 1	sigma(fst) = [1,2]
    PREC: from = s = add > cons > nil = fst > 0 > len
Number of Rules: 0