def min(a,b); a < b ? a : b; end
  
N, K = gets.split.map(&:to_i)
S = "o#{gets.chomp}x"
dp = Array.new(N + 1)
dp[N] = 0

(1 .. N).each do |i|
  j = N - i
  l = j + 1
  r = min(l + K, N)
  if S[j] == 'x' || dp[l] - dp[r] < r - l
    dp[j] = dp[j + 1] + 1
  else
    dp[j] = dp[j + 1]
  end
end
if dp[1] - dp[K + 1] < K
  puts (1 .. K).select{|i| dp[i] - dp[i + 1] == 0 }
else
  puts 0
end