You are given a code:

def main_solution(x):
    return ('tehk' + x)

Can you predict the output of `main_solution("zgsvpopydj")` 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": "zgsvpopydj"}, "ref_output": "tehkzgsvpopydj", "ref_code": "def main_solution(x):\n    return ('tehk' + x)", "funcname": "main_solution"}
rule