# Here your code !

n,m = gets.chomp.split(" ").map{|u|u.to_i}
a = []
xx = []
yy = []
flag = 0
n.times do |i|
    a[i] = gets.chomp
    c = a[i].index("*")
    if (c  != nil)
        yy.push(i)
        xx.push(c)
    end
end
n.times do |i|
    break if flag == 1
    m.times do |j|
        if ( (yy[0] - yy[1]) != 0)
            katamuki1 = ((xx[0] - xx[1])/(yy[0] - yy[1]).to_f )
            if ( (i - yy[1]) != 0)
                katamuki2 = ((j - xx[1])/(i - yy[1]).to_f )
                unless ((katamuki1 - katamuki2).abs <= 0.000001)
                    a[i][j] = "*"
                    flag = 1
                end
            else
                a[i][j] = "*"
                flag = 1
            end
        else
            if (i == yy[i])
                next
            end
        end
        


        break if flag == 1
    end
end
puts a