import itertools

alphabet = "ABCX"

ar = itertools.product(alphabet, repeat=5) #Раз­ме­ще­ние с по­вто­ре­ни­ем

arl = []

for i in ar:

arl.append(list(i))

count = 0

for e in arl:

if (e[-1] == 'X' or e[-1] != 'X') and e[0] != 'X' and e[1] != 'X' and e[2] != 'X' and e[3] != 'X':

count += 1

print(count)

slovo='abcx'

count=0

for x1 in slovo:

for x2 in slovo:

for x3 in slovo:

for x4 in slovo:

for x5 in slovo:

s = x1 + x2 + x3 + x4 +x5

if s.count('x')==1 and x5=='x' or s.count('x')==0:

count+=1

print(count)

import itertools

k=0

for p in itertools.product('ABCX',repeat=5):

if not 'X' in p[0:4]:

k += 1

print(k)