You are given a code:

def main_solution(x):
    return func_20((x + 'jhcvi'), func_15('cgnv'))

Can you predict the output of `main_solution("yvxtmhssqn")` 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": "yvxtmhssqn"}, "ref_output": "y\u00abvcx\u00bbt\u00abmgh\u00bbs\u00absnq\u00bbn\u00abjvh\u00bbcvi", "ref_code": "def main_solution(x):\n    return func_20((x + 'jhcvi'), func_15('cgnv'))", "funcname": "main_solution"}
rule