You are given a code:

def main_solution(x):
    return ('igl' + 'lnoo')

Can you predict the output of `main_solution("txtag")` 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": "txtag"}, "ref_output": "igllnoo", "ref_code": "def main_solution(x):\n    return ('igl' + 'lnoo')", "funcname": "main_solution"}
rule