n,m = gets.split.map &:to_i
a = []
s = n.times.map do |i|
  s_ = gets.chomp
  m.times do |j|
    if s_[j] == ?*
      a << [i, j]
    end
  end
  s_
end
if a[0][0] == a[1][0]
  if a[0][0] > 0
    s[a[0][0]-1][a[0][1]] = ?*
  else
    s[a[0][0]+1][a[0][1]] = ?*
  end
else
  if a[0][1] > 0
    s[a[0][0]][a[0][1]-1] = ?*
  else
    s[a[0][0]][a[0][1]+1] = ?*
  end
end
puts s*$/