(STRATEGY
    INNERMOST)

(VAR
    X X1 X2 X3)
(DATATYPES
    A = µX.< b, c, f(X, X, X) >)
(SIGNATURES
    a__f :: [A x A x A] -> A
    a__c :: [] -> A
    mark :: [A] -> A)
(RULES
    a__f(b(),X,c()) -> a__f(X
                           ,a__c()
                           ,X)
    a__c() -> b()
    mark(f(X1,X2,X3)) -> a__f(X1
                             ,mark(X2)
                             ,X3)
    mark(c()) -> a__c()
    mark(b()) -> b()
    a__f(X1,X2,X3) -> f(X1,X2,X3)
    a__c() -> c())