from itertools import *
count = 0
A = []
for elem in product('АЕКПТЧ', repeat = 7):
    s = ''.join(elem)
    A.append(s)
for i in range(len(A)):
    if A[i] == 'АПТЕЧКА':
        a1 = i + 1
    if A[i] == 'ПЕЧАТКА':
        a2 = i
print(a2 - a1)