You are given a code:

def main_solution(x):
    return ('fgl' + 'nynm')

Can you predict the output of `main_solution("kwcd")` 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": "kwcd"}, "ref_output": "fglnynm", "ref_code": "def main_solution(x):\n    return ('fgl' + 'nynm')", "funcname": "main_solution"}
rule