data = Array.new
i = 0

while (str = gets.chomp) != "0 0"
    data[i] = str.split " "
    i += 1
end

data.each do |status|
    for count1 in 1..status[0].to_i
        for count2 in 1..status[1].to_i
            print '#'
        end
        print "\n"
    end
    print "\n"
end