You are given a code:

def main_solution(x):
    return ('kgpm' + 'oyt')

Can you predict the output of `main_solution("smllheic")` 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": "smllheic"}, "ref_output": "kgpmoyt", "ref_code": "def main_solution(x):\n    return ('kgpm' + 'oyt')", "funcname": "main_solution"}
rule