You are given a code:

def main_solution(x):
    return func_4(func_4('iggwhz'))

Can you predict the output of `main_solution("lcza")` 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": "lcza"}, "ref_output": "iggwhz", "ref_code": "def main_solution(x):\n    return func_4(func_4('iggwhz'))", "funcname": "main_solution"}
rule