namespace AtCoder;

#nullable enable

using System.Numerics;

static class Extensions
{
    public static T[] Repeat<T>(this int time, Func<T> F) => Enumerable.Range(0, time).Select(_ => F()).ToArray();

    public static T[,] Rotated<T>(this T[,] g)
    {
        var (h, w) = (g.GetLength(0), g.GetLength(1));
        var res = new T[w, h];
        for (var i = 0; i < h; i++) for (var j = 0; j < w; j++) res[w - 1 - j, i] = g[i, j];
        return res;
    }

}

class AtCoder
{
    object? Solve()
    {
        var h = Int();
        var w = Int();
        var fz = new bool[2];
        {
            var cz = 2.Repeat(() => new bool[h, w]);
            for (var k = 0; k < 2; k++)
            {
                for (var i = 0; i < h; i++)
                {
                    var str = String();
                    for (var j = 0; j < w; j++) cz[k][i, j] = str[j] == '#';
                }
            }
            for (var k = 0; k < 2; k++)
            {
                fz[k] = true;
                for (var i = 0; i < h; i++) for (var j = 0; j < w; j++) fz[k] &= cz[0][i, j] ^ cz[1][i, j];
                cz[0] = cz[0].Rotated().Rotated();
            }
        }
        var ans = 0.0;
        var p = 2.0;
        var l = 1.0;
        for (var i = 1; i <= 100; i++)
        {
            p /= 2;
            if (!fz[(i - 1) & 1]) continue;
            var s = l * (1.0 - p);
            ans += s * i;
            l -= s;
        }
        return ans;
    }

    public static void Main() => new AtCoder().Run();
    public void Run()
    {
        var res = Solve();
        if (res != null)
        {
            if (res is bool yes) res = yes ? "Yes" : "No";
            sw.WriteLine(res);
        }
        sw.Flush();
    }

    string[] input = Array.Empty<string>();
    int iter = 0;
    readonly StreamWriter sw = new(Console.OpenStandardOutput()) { AutoFlush = false };

    string String()
    {
        while (iter >= input.Length) (input, iter) = (Console.ReadLine()!.Split(' '), 0);
        return input[iter++];
    }
    T Input<T>() where T : IParsable<T> => T.Parse(String(), null);
    int Int() => Input<int>();
    void Out(object? x, string? separator = null)
    {
        separator ??= Environment.NewLine;
        if (x is System.Collections.IEnumerable obj and not string)
        {
            var firstLine = true;
            foreach (var item in obj)
            {
                if (!firstLine) sw.Write(separator);
                firstLine = false;
                sw.Write(item);
            }
        }
        else sw.Write(x);
        sw.WriteLine();
    }
}