import collections
N = int(input())
K = int(input())

p1 = collections.Counter([i-j for i in range(1, 7) for j in range(1, 7)])
p2 = collections.Counter([i-j for i in range(4, 7) for j in range(1, 7)] * 2)

P = collections.defaultdict(int)
P[0] = 1
for n in range(N - K):
    newP = collections.defaultdict(int)
    for diff, freq in P.items():
        for diff2, freq2 in p1.items():
            newP[diff + diff2] += freq * freq2/36
    P = newP
for k in range(K):
    newP = collections.defaultdict(int)
    for diff, freq in P.items():
        for diff2, freq2 in p2.items():
            newP[diff + diff2] += freq * freq2/36
    P = newP
cump = sum(freq for diff, freq in P.items() if diff > 0)
print(cump)