You are given a code:

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

Can you predict the output of `main_solution("jqwfcwkbm")` 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": "jqwfcwkbm"}, "ref_output": "j\u00abquw\u00bbf\u00abchw\u00bbk\u00abbpm\u00bbj\u00abqiw\u00bbf\u00abcgw\u00bbk\u00abbmm\u00bbjqwfcwkbmjqwfcwkbm", "ref_code": "def main_solution(x):\n    return func_20(func_1(x, 4), func_15('uhpigm'))", "funcname": "main_solution"}
rule