package no226;

import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static long MOD = 1000000007;

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();
		char[][] m = new char[h][];
		for(int i=0;i<h;i++) {
			m[i] = sc.next().toCharArray();
		}
		long ans = count1(m) - count2(m);
		char[][] mt = new char[w][h];
		for(int i=0;i<h;i++) {
			for(int j=0;j<w;j++) {
				mt[j][i] = m[i][j];
			}
		}
		ans += count1(mt);
		System.out.println((ans % MOD + MOD)% MOD);
	}

	public static long count1(char[][] m) {
		int h = m.length;
		int w = m[0].length;
		int[] check = new int[w];
		Arrays.fill(check, 2);
		for(int i=0;i<h;i++) {
			for(int j=0;j<w;j++) {
				if (m[i][j] != '?') {
					int num = (m[i][j] - '0' + i) % 2;
					if (check[j] != 2 && check[j] != num) {
						return 0;
					}
					check[j] = num;
				}
			}
		}
		long ans = 1;
		for(int i=0;i<w;i++) {
			if (check[i] == 2) {
				ans = (ans * 2) % MOD;
			}
		}
		return ans;
	}

	public static long count2(char[][] m) {
		int h = m.length;
		int w = m[0].length;
		int type = 2;
		for(int i=0;i<h;i++) {
			for(int j=0;j<w;j++) {
				if (m[i][j] != '?') {
					int num = (m[i][j] - '0' + i + j) % 2;
					if (type != 2 && num != type) {
						return 0;
					}
					type = num;
				}
			}
		}
		return type == 2 ? 2 : 1;
	}

}