#include<bits/stdc++.h>
using namespace std;
const int md = 1e9+7;
int n,d,f[1<<8][1<<8],pd,sd,pp,sp;
int main(){
	scanf("%d%d",&n,&d);
	pd = d>>1;pp = 1<<pd;
	sd = d-(d>>1);sp = 1<<sd;
	int ans = 0;
	char ch = getchar();
	for(int i = 1,p,nf,pr,sf,isf;i<=n;i++){
		p = 0;
		while(!isdigit(ch))ch = getchar();
		for(int j = 1;j<=d;j++){
			p = (p<<1)+ch-'0';ch = getchar();
		}
		pr = (p>>sd);sf = (p&(sp-1));
		isf = sf^(sp-1);
		nf = 1;
		for(int np = pr;;np = (np-1)&pr){
			(nf+=f[np][sf])%=md;
			if(!np)break;
		}
//		printf("%d %d\n",p,nf);
		for(int np = isf;;np = (np-1)&isf){
			(f[pr][sf|np]+=nf)%=md;
			if(!np)break;
		}
		(ans+=nf)%=md;
	}
	printf("%d\n",ans);
	return 0;
}