(VAR X X1 X2 X3 )
(RULES 
        a__a -> a__c
        a__b -> a__c
        a__c -> e
        a__k -> l
        a__d -> m
        a__a -> a__d
        a__b -> a__d
        a__c -> l
        a__k -> m
        a__A -> a__h(a__f(a__a), a__f(a__b))
        a__h(X, X) -> a__g(mark(X), mark(X), a__f(a__k))
        a__g(d, X, X) -> a__A
        a__f(X) -> a__z(mark(X), X)
        a__z(e, X) -> mark(X)
        mark(A) -> a__A
        mark(a) -> a__a
        mark(b) -> a__b
        mark(c) -> a__c
        mark(d) -> a__d
        mark(k) -> a__k
        mark(z(X1, X2)) -> a__z(mark(X1), X2)
        mark(f(X)) -> a__f(mark(X))
        mark(h(X1, X2)) -> a__h(mark(X1), mark(X2))
        mark(g(X1, X2, X3)) -> a__g(mark(X1), mark(X2), mark(X3))
        mark(e) -> e
        mark(l) -> l
        mark(m) -> m
        a__A -> A
        a__a -> a
        a__b -> b
        a__c -> c
        a__d -> d
        a__k -> k
        a__z(X1, X2) -> z(X1, X2)
        a__f(X) -> f(X)
        a__h(X1, X2) -> h(X1, X2)
        a__g(X1, X2, X3) -> g(X1, X2, X3)
        
)