def f(S):
    ret=1
    for s in S:
        s01=s10=True
        for i in range(len(s)):
            s01&=s[i]=='?' or s[i]==str(i%2)
            s10&=s[i]=='?' or s[i]==str((i+1)%2)
        ret=ret*(int(s01)+int(s10))%MOD
    return ret
MOD=10**9+7
H,W=map(int,input().split())
S=[]
T=[""]*W
for i in range(H):
    S.append(input())
    for j in range(W):
        T[j]="".join([T[j],S[i][j]])
ans=f(S)+f(T)
P=True
Q=True
for i in range(H):
    for j in range(W):
        P&=S[i][j]=='?' or (S[i][j]==str((i+j)%2))
        Q&=S[i][j]=='?' or (S[i][j]==str((i+j+1)%2))
ans-=int(P)+int(Q)
print(ans%MOD)