Python - data decrypt

def decrypt(data, key):
    out = []
    box = list(range(256))

    x = 0
    for i in range(256):
        x = (x + box[i] + ord(key[i % len(key)])) % 256
        box[i], box[x] = box[x], box[i]
    #print('[DEBUG] x:', x) # 208

    x = 0
    y = 0
    for char in data:
        x = (x + 1) % 256
        y = (y + box[x]) % 256
        box[x], box[y] = box[y], box[x]
        out.append(char ^ box[(box[x] + box[y]) % 256])

    return ''.join(chr(x) for x in out)

if __name__ == '__main__':
    lyric_src = 'BF24AA05A1C1BB9E3EBAC6AFCEE077A0E9AB0E8B589056BC8903932FD7D73FFFD7398A18AC67C58D5A806139A140919801119D'
    data = bytes.fromhex(lyric_src)
    print(decrypt(bytes.fromhex(lyric_src), 'Lyr1cjust4nct'))