from itertools import *
Max = 0
A = []
for elem in product("ГОНДУБШ", repeat = 6):
    A.append(elem)
for i in range(len(A)):
    if i % 2 == 0 and A[i].count('Н') >= 2 and A[i].count('У') == 0 and A[i][0] != 'Б':
        Max = max(Max, i)
print(Max + 1)