You are given a code:

def main_solution(x):
    return func_20(func_1('pca', 4), func_15(x))

Can you predict the output of `main_solution("wyakcaqs")` without writing any code? Please reason and put your final answer in the following json format: {"output": <your output>}, where <your output> should be the final string.
user
{"ref_input": {"x": "wyakcaqs"}, "ref_output": "p\u00abcwa\u00bbp\u00abcya\u00bbp\u00abcaa\u00bbp\u00abcka\u00bb\u00abc\u00bb\u00aba\u00bb\u00abq\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('pca', 4), func_15(x))", "funcname": "main_solution"}
rule