using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplicationSharp { class Program { static void Main(string[] args) { long mod = (long)1e9 + 7; string[] s = Console.ReadLine().Split(' '); int n = int.Parse(s[0]), k = int.Parse(s[1]); if (k == 0) { //答えはn! long ret = 1; for (int i = 2; i <= n; i++) ret = (ret * i) % mod; Console.WriteLine(ret); } else { s = Console.ReadLine().Split(' '); long[] a = new long[k]; for (int i = 0; i < k; i++) a[i] = long.Parse(s[i]); Array.Sort(a); long ret = 1; int cnt = 0; for (int i = 0; (1 << i) <= a[0]; i++) { if ((a[0]>>i)%2==1) cnt++; } for (int i = 2; i <= cnt; i++) ret = (ret * cnt) % mod; for(int i = 1; i < k; i++) { if ((a[i] & a[i - 1]) != a[i - 1]) { ret = 0; break; } long diff = a[i] ^ a[i - 1]; cnt = 0; for(int j = 0; j < n; j++) { if ((diff >> j) % 2 == 1) cnt++; } for (int j = 2; j <= cnt; j++) ret = (ret * j) % mod; } Console.WriteLine(ret); } } } }