import math

n,m=map(int,input().split())
P=[i if i else None for i in range(n+1)]
for j in range(m):
	S=[int(_) for _ in input().split()]
	t=P[S[-1]]
	for k in range(1,S[0]):
		P[S[-k]]=P[S[-1-k]]
	P[S[1]]=t

#print(P)

A=[-1]*(n+1)
for i in range(1,n+1):
	if A[i]<0:
		S={i}
		j=i
		c=0
		while True:
			j=P[j]
			c+=1
			S=S|{j}
			if j==i:
				break
		for k in S:
			A[k]=c	

print(math.lcm(*A[1:])%998244353)