input: Write a python function to generate a bar chart using matplotlib with given x and y axes.
  assert generate_bar_chart(["Jan", "Feb", "Mar"], [10.02, 23.24, 39.20]) == 'Bar chart generated'
  assert generate_bar_chart(["Apr", "May", "Jun"], [35.42, 32.34, 27.04]) == 'Bar chart generated'
  assert generate_bar_chart(["Jul", "Aug", "Sep"], [43.82, 10.56, 11.85]) == 'Bar chart generated'
output: def generate_bar_chart(x, y):
      import matplotlib.pyplot as plt
      
      plt.bar(x, y)
      plt.xlabel('X Axis')
      plt.ylabel('Y Axis')
      plt.title('Bar Chart')
      plt.show()
      
      return 'Bar chart generated'