def root(x):
    if P[x] < 0: return x
    P[x] = root(P[x])  # 経路圧縮
    return P[x]
def unite(x,y):
    x = root(x)
    y = root(y)
    if x == y: return
    if x > y: x,y = y,x
    P[x] += P[y]
    P[y] = x

def same(x,y):
    return root(x) == root(y)

def size(x):
    x = root(x)
    return -P[x]

N,M = map(int,input().split())
P = [-1] * N

P1 = list(range(N))
for _ in range(M):
    P2 = P1[:]
    t,*S = map(int,input().split())
    S.append(S[0])
    for i in range(len(S)-1):
        P2[S[i+1]-1] = P1[S[i]-1]
    P1 = P2

for i,p in enumerate(P1):
    unite(i,p)
tmp = 1
for i in range(N):
    if i == root(i):
        tmp *= size(i)
print(tmp)