while str = STDIN.gets
  n = str.split(" ")
  a = n[0].to_i
  b = n[1].to_i

  if a == 0 || b == 0
    break
  end
  
  for h in 1..a do
    for w in 1..b do
      print "#"
    end
    print "\n"
  end
end
