mod=998244353

fac=[1]
for i in range(1,100):
  fac.append(fac[-1]*i%mod)

finv=[]
for i in range(100):
  finv.append(pow(fac[i],mod-2,mod))

n=int(input())
s=[]
for i in range(n):
  s.append(list(map(lambda x:int(x)-1,input().split())))
s.sort()
S=set([0])

for si in s:
  nS=set()
  for i in S:
    for j in si:
      nS.add(i+(1<<(5*j)))
  S=nS

ans=0
for bit in S:
  res=fac[n]
  for j in range(9):
    x=bit&31
    res*=finv[x]
    res%=mod
    bit>>=5  
  ans+=res

print(ans%mod)