How to convert a number in base −1+i to its negative? Extract real/imaginary parts? Conjugate?

Analyze the how to convert a number in base −1+i to its negative? extract real/imaginary parts? conjugate?.

Examples
Input: "test_input_1"
Output: "output_1"
Hints

How to convert a number in base −1+i to its negative? Extract real/imaginary parts? Conjugate?

Analyze the how to convert a number in base −1+i to its negative? extract real/imaginary parts? conjugate?.