require 'set'

$h, $w = gets.chomp.split.map(&:to_i)
$grid = []
$h.times do
  $grid.push gets.chomp
end

def search(cluster, y, x)
  if y > 0 && $grid[y-1][x] == '#' && !cluster[0].include?([y-1,x])
    if x > 0 && $grid[y-1][x-1] == '.'
      cluster[0].add([y-1, x])
      cluster[1].add([y-1, x-1])
      search(cluster, y-1, x-1)
    end
    if x < $w-1 && $grid[y-1][x+1] == '.'
      cluster[0].add([y-1, x])
      cluster[1].add([y-1, x+1])
      search(cluster, y-1, x+1)
    end
  end

  if y < $h-1 && $grid[y+1][x] == '#' && !cluster[0].include?([y+1,x])
    if x > 0 && $grid[y+1][x-1] == '.'
      cluster[0].add([y+1, x])
      cluster[1].add([y+1, x-1])
      search(cluster, y+1, x-1)
    end
    if x < $w-1 && $grid[y+1][x+1] == '.'
      cluster[0].add([y+1, x])
      cluster[1].add([y+1, x+1])
      search(cluster, y+1, x+1)
    end
  end

  if x > 0 && $grid[y][x-1] == '#' && !cluster[0].include?([y,x-1])
    if y > 0 && $grid[y-1][x-1] == '.'
      cluster[0].add([y, x-1])
      cluster[1].add([y-1, x-1])
      search(cluster, y-1, x-1)
    end
    if y < $h-1 && $grid[y+1][x-1] == '.'
      cluster[0].add([y, x-1])
      cluster[1].add([y+1, x-1])
      search(cluster, y+1, x-1)
    end
  end

  if x < $w-1 && $grid[y][x+1] == '#' && !cluster[0].include?([y,x+1])
    if y > 0 && $grid[y-1][x+1] == '.'
      cluster[0].add([y, x+1])
      cluster[1].add([y-1, x+1])
      search(cluster, y-1, x+1)
    end
    if y < $h-1 && $grid[y+1][x+1] == '.'
      cluster[0].add([y, x+1])
      cluster[1].add([y+1, x+1])
      search(cluster, y+1, x+1)
    end
  end
end

def make_cluster(i,j)
  cluster = [Set.new, Set.new]
  cluster[0].add([i,j])
  if i > 0 && $grid[i-1][j] == '.'
    cluster[1].add [i-1,j]
    search(cluster, i-1, j)
  end
  if i < $h-1 && $grid[i+1][j] == '.'
    cluster[1].add [i+1,j]
    search(cluster, i+1, j)
  end
  if j > 0 && $grid[i][j-1] == '.'
    cluster[1].add [i,j-1]
    search(cluster, i, j-1)
  end
  if j < $w-1 && $grid[i][j+1] == '.'
    cluster[1].add [i,j+1]
    search(cluster, i, j+1)
  end
  cluster
end

$clusters = []
$h.times do |i|
  $w.times do |j|
    if $grid[i][j] == '#'
      if $clusters.all?{|cluster| not cluster[0].include?([i,j])}
        $clusters.push make_cluster(i,j)
      end
    end
  end
end

ans = 0
$clusters.each do |c|
  ans += c[0].count * c[1].count
end

puts ans
