def convert_hex_to_bin(hex_str):
    return bin(int(hex_str, 16))[2:].zfill(8)
 
 
def format_bin(bin_str):
    return bin_str.replace("1", "x").replace("0", " ")
 
 
def main():
    hex_list = ["FF 81 BD A5 A5 BD 81 FF",
            "AA 55 AA 55 AA 55 AA 55",
            "3E 7F FC F8 F8 FC 7F 3E",
            "93 93 93 F3 F3 93 93 93"]
 
    for image in hex_list:
        for line in image.split():
            print(format_bin(convert_hex_to_bin(line)))
 
if __name__ == "__main__":
    main()

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