You are given a code:

def main_solution(x):
    return (func_13(x, '_') + func_5(x, 'nxda'))

Can you predict the output of `main_solution("peqdrjcic")` 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": "peqdrjcic"}, "ref_output": "p_e_q_d_r_j_c_i_cnxdapeqdrjcic", "ref_code": "def main_solution(x):\n    return (func_13(x, '_') + func_5(x, 'nxda'))", "funcname": "main_solution"}
rule