#!/usr/bin/ python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import numpy as np

MOD = 10 ** 9 + 7

H, W = map(int, readline().split())
S = np.frombuffer(read(), 'S1').reshape(H, -1)[:, :W]
answer = 0
for _ in range(2):
    S = S.T
    p = 1
    for row in S:
        x = 0
        if np.all(row[::2] != b'0') and np.all(row[1::2] != b'1'):
            x += 1
        if np.all(row[::2] != b'1') and np.all(row[1::2] != b'0'):
            x += 1
        p *= x
    answer += p

if all((np.all(S[::2, ::2] != b'0'),
        np.all(S[1::2, 1::2] != b'0'),
        np.all(S[1::2, ::2] != b'1'),
        np.all(S[::2, 1::2] != b'1'))):
    answer -= 1

if all((np.all(S[::2, ::2] != b'1'),
        np.all(S[1::2, 1::2] != b'1'),
        np.all(S[1::2, ::2] != b'0'),
        np.all(S[::2, 1::2] != b'0'))):
    answer -= 1


print(answer % MOD)