You are given a code:

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

Can you predict the output of `main_solution("lcra")` 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": "lcra"}, "ref_output": "l\u00abclr\u00bba\u00ablqc\u00bbr\u00abatl\u00bbc\u00abrfa\u00bb\u00abs\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1(x, 3), func_15('lqtfsu'))", "funcname": "main_solution"}
rule