gistfile1.rb

#!/usr/bin/env ruby

puts "If the world is round..."
STDOUT.flush
str = gets.chomp.split('+')

first   = str.first.strip
second  = str.last.strip

def get_result(num)
  ans = 0
  num.split("").each do |c|
    c = c.to_i
    if c == 0 || c == 6 || c == 9
      ans += 1
    elsif c == 8
      ans += 2
    end
  end
  ans
end

puts get_result(first) + get_result(second)