class Unionfind:#根っこ参照で付け直し、デカイ木にちっさい木をつける
    def __init__(self,n):
        self.parent=[i for i in range(n)]#自分の親頂点の番号
        self.num=[1]*n#自分を根とする部分木の頂点の個数
        self.rank=[1]*n#自分を根とする部分木の高さ
    def find(self,i):
        if self.parent[i]==i:
            return i
        else:
            self.parent[i]=self.find(self.parent[i])
            return self.parent[i]
    def union(self,i,j):
        a=self.find(i)
        b=self.find(j)
        if self.rank[a]>self.rank[b]:
            self.parent[b]=a
            
            self.num[a]+=self.num[b]
        elif self.rank[a]<self.rank[b]:
            self.parent[a]=b
            self.num[b]+=self.num[a]
        else:
            if a!=b:
                self.rank[a]+=1
                self.parent[b]=a
                self.num[a]+=self.num[b]
    def numb(self,i):#その頂点を含む連結成分の点の個数
        j=self.find(i)
        return self.num[j]
    
W,H=map(int,input().split())
a=[-1]*W
U=Unionfind(W)
mod=998244353
A=[]
for _ in range(H):
    res=input()
    if A and A[-1]==0:
        A.append(0)
        continue
    ans=1
    alpha=[[] for _ in range(26)]
    num=[]
    for i in range(W):
        if 48<=ord(res[i])<=57:
            num.append(i)
        if 97<=ord(res[i])<=97+25:
            alpha[ord(res[i])-97].append(i)
    for i in range(26):
        l=len(alpha[i])
        if l!=0:
            for j in range(l-1):
                if a[U.find(alpha[i][j])]!=-1 and a[U.find(alpha[i][j+1])]!=-1 and a[U.find(alpha[i][j])]!=a[U.find(alpha[i][j+1])]:
                    ans=0
                    break
                aa=U.find(alpha[i][j])
                bb=U.find(alpha[i][j+1])
                if aa!=bb:
                    U.union(alpha[i][j],alpha[i][j+1])
                    if a[aa]!=-1 and a[bb]==-1:
                        a[U.find(alpha[i][j])]=a[aa]
                    if a[aa]==-1 and a[bb]!=-1:
                        a[U.find(alpha[i][j])]=a[bb]
            if ans==0:
                break
    for i in num:
        t=int(res[i])
        if a[U.find(i)]!=-1 and a[U.find(i)]!=t:
            ans=0
            break
        elif a[U.find(i)]==-1:
            a[U.find(i)]=t
    if ans==0:
        A.append(ans)
        continue
    for i in range(W):
        if U.find(i)==i and a[U.find(i)]==-1:
            ans*=10
            ans%=mod
    A.append(ans)
for t in A:
    print(t)