Input TRS:
    1: a__c() -> a__f(g(c()))
    2: a__f(g(X)) -> g(X)
    3: mark(c()) -> a__c()
    4: mark(f(X)) -> a__f(X)
    5: mark(g(X)) -> g(X)
    6: a__c() -> c()
    7: a__f(X) -> f(X)
Number of Rules: 7
Direct POLO(Sum) ... orients all.
	I(mark) = x1 + 3
	I(a__c) = 2
	I(a__f) = x1 + 1
	I(c) = 0
	I(f) = x1
	I(g) = x1
Number of Rules: 0