#!/usr/bin/env ruby
# coding: utf-8

l = 10
s = "   "
b = "---"

# header
puts (1...l).inject(["A"]){|a,l| a<<a[-1].succ}.join(s)

# body
12.times{
  puts (["|"]*l).zip((1...l).map{(rand*10).to_i.zero? ? b : s}).join
}

# footer
puts ["!",*[" "]*(l-1)].shuffle.join(s)