You are given a code:

def main_solution(x):
    return (func_13('zezybk', '|') + func_13('xuyegx', '_'))

Can you predict the output of `main_solution("lsus")` 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": "lsus"}, "ref_output": "z|e|z|y|b|kx_u_y_e_g_x", "ref_code": "def main_solution(x):\n    return (func_13('zezybk', '|') + func_13('xuyegx', '_'))", "funcname": "main_solution"}
rule