from sys import stdin
input=lambda :stdin.readline()[:-1]

from collections import defaultdict

class UnionFind():
  def __init__(self,n):
    self.n=n
    self.parents=[-1]*n
    self.grp_cnt=n

  def find(self,x):
    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):
    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
    self.grp_cnt-=1

  def size(self,x):
    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

mod=998244353
w,h=map(int,input().split())
uf=UnionFind(w+10)
flag=False
from collections import defaultdict
for _ in range(h):
  s=input()
  if flag:
    continue
  d=defaultdict(list)
  for i in range(w):
    d[s[i]].append(i)
  
  for j in d:
    if '0'<=j<='9':
      for i in d[j]:
        uf.union(i,w+int(j))
    else:
      if j=='?':
        continue
      for i in d[j]:
        uf.union(d[j][0],i)
  
  for i in range(10):
    for j in range(i+1,10):
      if uf.same(w+i,w+j):
        flag=True
  
  if flag:
    print(0)
  else:
    g=uf.all_group_members()
    c=len(g)-10
    print(pow(10,c,mod))