List the unit numbers of any pair of condos that have the same square footage. For example, one pair would be unit number 201 and unit number 401, because the square footage for both units is 1,030 square feet. The first unit number listed should be the major sort key and the second unit number should be the minor sort key.

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)

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