  We refine the complexity landscape for enumeration problems by introducing
very low classes defined by using Boolean circuits as enumerators. We locate
well-known enumeration problems, e.g., from graph theory, Gray code
enumeration, and propositional satisfiability in our classes. In this way we
obtain a framework to distinguish between the complexity of different problems
known to be in $\mathbf{DelayP}$, for which a formal way of comparison was not
possible to this day.
