"""


"""

import sys
from sys import stdin

N,M = map(int,stdin.readline().split())

p = [i for i in range(N)]

for lp in range(M):

    ts = list(map(int,stdin.readline().split()))

    s = []

    for j in range(1,len(ts)):
        s.append(ts[j]-1)
    s.reverse()

    pz = p[s[0]]

    for i in range(len(s)-1):
        p[s[i]] = p[s[i+1]]
    p[s[-1]] = pz

    #print (p)


end = [False] * N

c = []

for i in range(N):

    if not end[i]:

        v = i
        now = 0
        
        while True:
            end[v] = True
            v = p[v]
            now += 1
            if v == i:
                break

        c.append(now)

#print (c,p)

ans = 1
import math

for i in c:
    
    ans = i * ans // math.gcd(i,ans)

print (ans % 998244353)