Complex numbers: multiplication and division

Input

Each line contains an example of multiplication or division of complex numbers. The complex number is given in the format $a + bi$ a + bi or $a - bi$ a - bi, where $a$ is integer, $b$ is non-negative integer. The real and imaginary part of each complex number is no more than $1 0^{9}$ 10^9 by absolute value.

Output

For each input example, print in a separate line the answer. The real and imaginary part of the complex number should be presented with two decimal places.

Examples

Example 1

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