You are given a code:

def main_solution(x):
    return func_22('ijif')

Can you predict the output of `main_solution("ystpsm")` 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": "ystpsm"}, "ref_output": "ijif", "ref_code": "def main_solution(x):\n    return func_22('ijif')", "funcname": "main_solution"}
rule