If FP 10 and HX 16 what does DS?

To answer the question accurately, more context is needed regarding what FP, HX, and DS refer to, as they could represent various concepts depending on the field (e.g., mathematics, science, coding, etc.). Without additional information, it's not possible to determine what DS represents in relation to FP 10 and HX 16. Please provide further details for a more precise answer.