# exercise_7

def main() :
    print("This program illustrates a chaotic function")
    x = eval(input("Enter a number between 0 and 1: "))
    y = eval(input("Enter a number between 0 and 1: "))
    for i in range(10) :
        x = 3.9 * x * (1-x)
        y = 3.9 * y * (1-y)
        print("     %.6f,       %.6f" % (x, y))

main()
