import matplotlib.pyplot as plt

f = open('ciphertext.txt')

ciphertext = f.readline().upper()

letter_count = {}

letters = [chr(i) for i in range(ord('A'), ord('Z')+1)]

for c in letters:
    letter_count[c] = 0

for c in ciphertext:
    if c in letter_count.keys():
        letter_count[c] += 1

print(letter_count)

x = range(0,26)
y = [letter_count[chr(ord('A')+i)] for i in range(0,26)]

plt.bar(x, y)
plt.xticks(x, letters)  # Set locations and labels


plt.show()