You are given a code:

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

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