You are given a code:

def main_solution(x):
    return (('htc' + 'xzpik') + func_13(x, '|'))

Can you predict the output of `main_solution("rwiirpwvan")` 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": "rwiirpwvan"}, "ref_output": "htcxzpikr|w|i|i|r|p|w|v|a|n", "ref_code": "def main_solution(x):\n    return (('htc' + 'xzpik') + func_13(x, '|'))", "funcname": "main_solution"}
rule