import  json
def rgb_to_grayscale(red, green, blue):
    grayscale = 0.2989 * red + 0.5870 * green + 0.1140 * blue
    return grayscale


value = 0, 133, 130
red_value, green_value, blue_value = value
gray_value = rgb_to_grayscale(red_value, green_value, blue_value)
print("Grayscale value:", gray_value)




for i in  range(0, 14):
    filename = str(i) + ".txt"
    with open(filename, 'w') as f:
        pass  # Write nothing to the file