from collections import defaultdict

class UnionFind():
    def __init__(self, n):
        '''
        UnionFindクラス。nは要素数を表す。
        '''
        self.n = n
        self.parents = [-1] * n

    def find(self, x):
        '''
        要素xを含む集合の親を見つける関数。
        '''
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]

    def union(self, x, y):
        '''
        要素xを含む集合と要素yを含む集合を合体する関数。
        基本的には、要素数が多い集合に統合される。
        要素数が同じときは要素yを含む集合に統合される。
        '''
        x = self.find(x)
        y = self.find(y)

        if x == y:
            return

        if self.parents[x] > self.parents[y]:
            x, y = y, x

        self.parents[x] += self.parents[y]
        self.parents[y] = x

    def size(self, x):
        '''
        要素xを含む集合の要素数を出す関数。
        '''
        return -self.parents[self.find(x)]

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]

    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]

    def group_count(self):
        return len(self.roots())

    def all_group_members(self):
        group_members = defaultdict(list)
        for member in range(self.n):
            group_members[self.find(member)].append(member)
        return group_members

    def __str__(self):
        return '\n'.join(f'{r}: {m}' for r, m in self.all_group_members().items())

n, m = map(int, input().split())
P = [i for i in range(n + 1)]
NP = P[:]
for _ in range(m):
    t, *S = map(int, input().split())
    for i in range(t):
        ci, ni = S[i], S[(i + 1) % t]
        NP[ni] = P[ci]
    P = NP[:]
mod = 998244353

G = [1 for _ in range(n + 1)]
UF = UnionFind(n + 1)
for i in range(1, n + 1):
    if P[i] == i:
        continue
    j = P[i]
    if UF.same(i, j):
        continue
    i_root = UF.find(i)
    j_root = UF.find(j)
    UF.union(i, j)
    root = UF.find(i)
    if root == i_root:
        G[i_root] += G[j_root]
        G[j_root] = 0
    else:
        G[j_root] += G[i_root]
        G[i_root] = 0
N = set()
for i in range(1, n + 1):
    if G[i] == 0:
        continue
    N.add(G[i])
ans = 1
PrimeCnt = defaultdict(int)
for num in N:
    if num % 2 == 0:
        cnt = 0
        while num % 2 == 0:
            num //= 2
            cnt += 1
        PrimeCnt[2] = max(PrimeCnt[2], cnt)
    f = 3
    while f * f <= num:
        if num % f == 0:
            cnt = 0
            while num % f == 0:
                num //= f
                cnt += 1
            PrimeCnt[f] = max(PrimeCnt[f], cnt)
        f += 2
    if num != 1:
        PrimeCnt[num] = max(PrimeCnt[num], 1)
ans = 1
for prime, cnt in PrimeCnt.items():
    ans *= pow(prime, cnt, mod)
    ans %= mod
print(ans)