Write code that draws two histograms A and B superimposed on each other with bins=12 and legend

import matplotlib.pyplot as plt

def draw_histogram(a,b,legend):
  plt.hist(a, bins=12)
  plt.hist(b, bins=12)
  plt.title("Normal Distribution")
  plt.xlabel("x")
  plt.ylabel("Frequency")
  plt.legend(legend)
  plt.show()

A = [1,2,3,4,5,6,7,8,9,10,11,12]
B = [1,2,3,4,5,3,3,2,2,2,2,1]
legend = ["A", "B"]
draw_histogram(A,B,legend)