You are given a code:

def main_solution(x):
    return func_20(func_1('lztvs', 3), func_15(x))

Can you predict the output of `main_solution("yyia")` 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": "yyia"}, "ref_output": "l\u00abzyt\u00bbv\u00absyl\u00bbz\u00abtiv\u00bbs\u00ablaz\u00bbtvs", "ref_code": "def main_solution(x):\n    return func_20(func_1('lztvs', 3), func_15(x))", "funcname": "main_solution"}
rule