N, K = gets.split.map(&:to_i)
MOD = 10 ** 9 + 7

if K == 0
  puts (1..N).inject(:*) % MOD
  exit
end

A = gets.split.map(&:to_i).sort
A << 2 ** N - 1
ans = 1
mask = 0

A.each do |a|
  cnt = 0

  N.times do |i|
    ans = 0 if mask[i] == 1 && a[i] == 0
    cnt += 1 if mask[i] == 0 && a[i] == 1
  end

  mask |= a
  v = [1, cnt].max
  ans *= (1..v).inject(:*)
  ans %= MOD
end

puts ans