#!/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, in freq.keys.sort{|x, y| freq[y] <=> freq[x]}
  if /[a-z]/ =~ ch
    printf(" %s | %3d\n", ch, freq[ch])
  end
end
puts "---+--------"