#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001


int main(){
	int n,m;
	cin>>n>>m;
	
	vector<string> s(n);
	rep(i,n)cin>>s[i];
	
	mint ans = 0;
	mint cur = 1;
	rep(i,n){
		mint t = 0;
		bool f = true;
		rep(j,m){
			if(s[i][j]=='?'||(s[i][j]-'0')==j%2)continue;
			f = false;
		}
		if(f)t++;
		f = true;
		rep(j,m){
			if(s[i][j]=='?'||(s[i][j]-'0')!=j%2)continue;
			f = false;
		}
		if(f)t++;
		cur *= t;
	}
	ans += cur;
	cur = 1;
	rep(i,m){
		mint t = 0;
		bool f = true;
		rep(j,n){
			if(s[j][i]=='?'||(s[j][i]-'0')==j%2)continue;
			f = false;
		}
		if(f)t++;
		f = true;
		rep(j,n){
			if(s[j][i]=='?'||(s[j][i]-'0')!=j%2)continue;
			f = false;
		}
		if(f)t++;
		cur *= t;
	}
	ans += cur;
	
	cur = 0;
	bool f = true;
	rep(i,n){
		rep(j,m){
			if(s[i][j]=='?'||(s[i][j]-'0')==(i+j)%2)continue;
			f = false;
		}
	}
	if(f)ans--;
	f = true;
	rep(i,n){
		rep(j,m){
			if(s[i][j]=='?'||(s[i][j]-'0')!=(i+j)%2)continue;
			f = false;
		}
	}
	if(f)ans--;
	
	cout<<ans.val()<<endl;
	
	return 0;
}