#!/usr/local/bin/ruby

freq=Hash.new(0)

while s=gets
  for ch in s.chomp!.split(//)
    freq[ch] += 1
  end
end

puts "---+--------"
for ch, count in freq do
  if /[a-e]/ =~ ch
    printf(" %s | %3d\n", ch, count)
 end
end
puts "---+--------"