using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using Enu = System.Linq.Enumerable;

class Program
{
    static readonly int Mod = (int)1e9 + 7;
    void Add(ref int a, int b) { if ((a += b) >= Mod) a -= Mod; }

    public void Solve()
    {
        int H = Reader.Int(), W = Reader.Int();
        var grid = Reader.StringArray(H);
        int ans = (DP(grid) + DP(Rotate(grid))) % Mod;
        ans = (ans + Mod - CheckerdPattern(grid)) % Mod;
        Console.WriteLine(ans);
    }

    int DP(string[] grid)
    {
        // grid[r][c] ^ 1 == grid[r + 1][c]
        int H = grid.Length, W = grid[0].Length;
        int[] count = new int[W];

        for (int c = 0; c < W; c++)
            for (int top = 0; top < 2; top++)
            {
                bool ok = true;
                for (int r = 0; r < H; r++)
                    if (grid[r][c] != '?' && grid[r][c] - '0' != (top + r) % 2) ok = false;
                if (ok) count[c]++;
            }
        int res = 1;
        foreach (int x in count) res = res * x % Mod;

        return res;
    }

    int CheckerdPattern(string[] grid)
    {
        int[] pattern = { 1, 1 };
        for (int r = 0; r < grid.Length; r++)
            for (int c = 0; c < grid[0].Length; c++)
                if (grid[r][c] != '?')
                {
                    if (grid[r][c] - '0' != (r + c) % 2) pattern[0] = 0;
                    if (grid[r][c] - '0' != (1 + r + c) % 2) pattern[1] = 0;
                }
        return pattern.Sum();
    }

    string[] Rotate(string[] a)
    {
        int H = a.Length, W = a[0].Length;
        var rotated = new string[W];
        for (int c = 0; c < W; c++)
            for (int r = 0; r < H; r++)
                rotated[c] += a[r][c];
        return rotated;
    }
}


class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
    private static TextReader reader = Console.In;
    private static readonly char[] separator = { ' ' };
    private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
    private static string[] A = new string[0];
    private static int i;
    private static void Init() { A = new string[0]; }
    public static void Set(TextReader r) { reader = r; Init(); }
    public static void Set(string file) { reader = new StreamReader(file); Init(); }
    public static bool HasNext() { return CheckNext(); }
    public static string String() { return Next(); }
    public static int Int() { return int.Parse(Next()); }
    public static long Long() { return long.Parse(Next()); }
    public static double Double() { return double.Parse(Next()); }
    public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
    public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
    public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
    public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
    public static string Line() { return reader.ReadLine().Trim(); }
    private static string[] Split(string s) { return s.Split(separator, op); }
    private static string Next() { CheckNext(); return A[i++]; }
    private static bool CheckNext()
    {
        if (i < A.Length) return true;
        string line = reader.ReadLine();
        if (line == null) return false;
        if (line == "") return CheckNext();
        A = Split(line);
        i = 0;
        return true;
    }
}