You are given a code:

def main_solution(x):
    return func_20(func_20('tjawqr', 'tmxktf'), func_15('tlm'))

Can you predict the output of `main_solution("epwgtkov")` 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": "epwgtkov"}, "ref_output": "t\u00abttj\u00bbm\u00abalx\u00bbw\u00abkmq\u00bbtrf", "ref_code": "def main_solution(x):\n    return func_20(func_20('tjawqr', 'tmxktf'), func_15('tlm'))", "funcname": "main_solution"}
rule