import numpy as np
from array import *

str = "Hello world!!"

alfavit = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

n = 1
col = array('i', [0])
while n < len(alfavit):
    col.append(0)
    n = n + 1


i = 0
j = 0

while i < len(str):
    while j < len(alfavit):
        if alfavit[j] == str[i]:
            col[j] = col[j] + 1
        j = j + 1
    j = 0
    i = i + 1

print(col[11])