import itertools

alphabet = "ABCDXYZ"

s = 'XYZ'

s1 = 'ABCD'

ar = itertools.product(alphabet, repeat=4) #Раз­ме­ще­ние с по­вто­ре­ни­ем

arl = []

for i in ar:

arl.append(list(i))

count = 0

for e in arl:

if e[0] in s and e[1] in s and e[2] in s1 and e[3] in s1:

count += 1

print(count)

a12=['x','y','z']

a34=['a','b','c','d']

k=0

for b1 in a12:

for b2 in a12:

for b3 in a34:

for b4 in a34:

s=b1+b2+b3+b4

k+=1

print(k)

from itertools import product

counter1 = 0

counter2 = 0

for i in product("ABCD", repeat=2):

counter1 += 1

for i in product("XYZ", repeat=2):

counter2 += 1

print(counter1*counter2)