You are given a code:

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

Can you predict the output of `main_solution("kqwa")` 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": "kqwa"}, "ref_output": "k|u|g|x|k|q|w|a", "ref_code": "def main_solution(x):\n    return func_13(('kugx' + x), '|')", "funcname": "main_solution"}
rule