import sys

sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


H,W = MI()
X = [S() for _ in range(H)]
mod = 10**9+7


ans1 = 1  # 1列目が縞々
for j in range(W):
    zero,one,q = 0,0,0
    for i in range(H):
        x = X[i][j]
        if x == '?':
            q += 1
        else:
            x = int(x)
            if i % 2 == 0:
                if x == 0:
                    zero += 1
                else:
                    one += 1
            else:
                if x == 0:
                    one += 1
                else:
                    zero += 1
    a = 1
    if zero and one:
        a = 0
    elif zero == 0 and one == 0:
        a = 2
        
    ans1 *= a
    ans1 %= mod


ans2 = 1  # 1行目が縞々
for i in range(H):
    zero,one,q = 0,0,0
    for j in range(W):
        x = X[i][j]
        if x == '?':
            q += 1
        else:
            x = int(x)
            if j % 2 == 0:
                if x == 0:
                    zero += 1
                else:
                    one += 1
            else:
                if x == 0:
                    one += 1
                else:
                    zero += 1
    a = 1
    if zero and one:
        a = 0
    elif zero == 0 and one == 0:
        a = 2

    ans2 *= a
    ans2 %= mod


ans3 = 0  # 1行目,1列目が縞々

X1 = []
X2 = []
A = '01'*(W//2)+'0'*(W % 2)
for i in range(H):
    X1.append(A)
    if A[-1] == '0':
        A += '1'
    else:
        A += '0'
    A = A[1:]
    X2.append(A)

for i in range(H):
    for j in range(W):
        if X[i][j] != '?' and X1[i][j] != X[i][j]:
            break
    else:
        continue
    break
else:
    ans3 += 1

for i in range(H):
    for j in range(W):
        if X[i][j] != '?' and X2[i][j] != X[i][j]:
            break
    else:
        continue
    break
else:
    ans3 += 1


ans = ans1+ans2-ans3
ans %= mod
print(ans)