h,w = gets.split.map(&:to_i)

y = 0
star = []
while cin=gets
    if cin=~/(-*)\*/
        x = $1.size
        star << [x,y]
    end
    y+=1
end

if star[0][0] == star[1][0] && star[0][0]==0
    puts "-*"+"-"*(w-2)
else
    puts "*"+"-"*(w-1)
end