You are given a code:

def main_solution(x):
    return func_13(func_20(x, 'jypho'), '|')

Can you predict the output of `main_solution("unwwvvmw")` 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": "unwwvvmw"}, "ref_output": "u|j|n|y|w|p|w|h|v|o|v|m|w", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'jypho'), '|')", "funcname": "main_solution"}
rule