You are given a code:

def main_solution(x):
    return func_20(func_13(x, '_'), func_15('spg'))

Can you predict the output of `main_solution("cqlqhkear")` 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": "cqlqhkear"}, "ref_output": "c\u00ab_sq\u00bb_\u00ablp_\u00bbq\u00ab_gh\u00bb_k_e_a_r", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '_'), func_15('spg'))", "funcname": "main_solution"}
rule