from itertools import *
count = 0
A = []
for elem in product('БИТКОИН', repeat = 7):
    s = ''.join(elem)
    if s.count('Б') == s.count('Т') == s.count('К') ==s.count('О') == s.count('Н') == 1 and s.count('И') == 2 and s not in A:
        A.append(s)
print(len(A))