import random

ls = []

for i in range(ord('a'), ord('z') + 1):

ls.append(chr(i))

for i in range(ord('A'), ord('Z') + 1):

ls.append(chr(i))

for i in range(ord('1'), ord('9') + 1):

ls.append(chr(i))

ls_pwd = []

for j in range(61):

ls2 = ls.copy()

pwd = ''

for k in range(8):

while k == 0:

random_index = random.randint(0, len(ls2)-1)

random_value = ls2[random_index]

pwd += ls2.pop(random_index)

for m in ls_pwd:

if m[0] == pwd:

ls2.insert(random_index, random_value)

pwd = ''

break

else:

break

pwd += ls2.pop(random.randint(0, len(ls2)-1))

ls_pwd.append(pwd)

ls_one = []

for one in ls_pwd:

ls_one.append(one[0])

print(len(set(ls_one)))

# print(ls_pwd)