sentences:  If in the previous example, chunk formula_26 had been lost as well, we would computeformula_27formula_28On a bitwise level, this represents a system of formula_29 equations in formula_29 unknowns which uniquely determine the lost data.This system will no longer work applied to a larger number of drives formula_31.This is because if we repeatedly apply the shift operator formula_32 times to a chunk of length formula_32, we end up back where we started.