class Unionfind:
     
    def __init__(self,n):
        self.uf = [-1]*n
 
    def find(self,x):
        if self.uf[x] < 0:
            return x
        else:
            self.uf[x] = self.find(self.uf[x])
            return self.uf[x]
 
    def same(self,x,y):
        return self.find(x) == self.find(y)
 
    def union(self,x,y):
        x = self.find(x)
        y = self.find(y)
        if x == y:
            return False
        if self.uf[x] > self.uf[y]:
            x,y = y,x
        self.uf[x] += self.uf[y]
        self.uf[y] = x
        return True
 
    def size(self,x):
        x = self.find(x)
        return -self.uf[x]

n,m = map(int,input().split())
mod = 998244353

P = [i for i in range(n)]

for _ in range(m):
    t,*S = map(int,input().split())

    S = [s-1 for s in S]
    rec = P[S[-1]]

    for i in range(t-1)[::-1]:
        x = S[i]
        nx = S[i+1]
        P[nx] = P[x]
    P[S[0]] = rec

uf = Unionfind(n)

for i,p in enumerate(P):
    uf.union(i,p)


ans = 1

facts = {}
for i in range(n):
    if uf.find(i) != i:
        continue
    size = uf.size(i)
    for j in range(2,int(size**0.5)+1):
        if size%j:
            continue
        count = 0
        while size % j == 0:
            size //= j
            count += 1

        facts[j] = max(facts.get(j,0),count)
    
    if size != 1:
        facts[size] = max(facts.get(size,0),1)

for f,num in facts.items():
    ans *= pow(f,num,mod)
    ans %= mod
print(ans)