The relative energies (kJ/mol) of successive stationary points along a reaction path, from reactant to product, are: 0, 48, 20, 66, 35, 41, 12, 58, $-15$. Every interior point is a local maximum or a local minimum. Counting only interior minima as intermediates (the reactant and product are not intermediates), how many intermediates does the reaction have?

Numerical answer type, tolerance 0.5.