You are given a code:

def main_solution(x):
    return func_5(func_13(x, '|'), 'sqdv')

Can you predict the output of `main_solution("pwrdaxtafx")` 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": "pwrdaxtafx"}, "ref_output": "sqdvp|w|r|d|a|x|t|a|f|x", "ref_code": "def main_solution(x):\n    return func_5(func_13(x, '|'), 'sqdv')", "funcname": "main_solution"}
rule