import matplotlib.pyplot as plt


def bar_charth(numbers, labels, pos):
    plt.barh(pos, numbers, color="blue")
    plt.yticks(ticks=pos, labels=labels)
    plt.show()


if __name__ == "__main__":
    numbers = [2, 1, 4, 6]
    labels = ["Electric", "Solar", "Diesel", "Unleaded"]
    pos = list(range(4))
    bar_charth(numbers, labels, pos)