You are given a code:

def main_solution(x):
    return func_20((x + 'sop'), func_15('gppif'))

Can you predict the output of `main_solution("yquojm")` 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": "yquojm"}, "ref_output": "y\u00abqgu\u00bbo\u00abjpm\u00bbs\u00abopp\u00bb\u00abi\u00bb\u00abf\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'sop'), func_15('gppif'))", "funcname": "main_solution"}
rule