Value of expression 3

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

Find the value of expression for the given values of the variables $x$ and $y$ .

\frac{2 x + y}{x ^{2} - x y + 4 y ^{2}} + \frac{2 x ^{2} - x y + y ^{2}}{x + 4 y}

Input

Values of the variables $x$ and $y$ .

Print the value of expression up to thousandths.

Input #1

Answer #1

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