You are given a code:

def main_solution(x):
    return func_20(('ekka' + x), func_15('kwo'))

Can you predict the output of `main_solution("laf")` 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": "laf"}, "ref_output": "e\u00abkkk\u00bba\u00ablwa\u00bbf\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('ekka' + x), func_15('kwo'))", "funcname": "main_solution"}
rule