You are given a code:

def main_solution(x):
    return (func_13('ybaip', '_') + func_15(x))

Can you predict the output of `main_solution("kcbqgxfi")` 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": "kcbqgxfi"}, "ref_output": "y_b_a_i_p\u00abk\u00bb\u00abc\u00bb\u00abb\u00bb\u00abq\u00bb\u00abg\u00bb\u00abx\u00bb\u00abf\u00bb\u00abi\u00bb", "ref_code": "def main_solution(x):\n    return (func_13('ybaip', '_') + func_15(x))", "funcname": "main_solution"}
rule