Translates your name to a ninja name, Based on this chart https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/562718_260591850723037_282005643_n.jpg

ninja.rb

#!/usr/bin/env ruby

LETTERS = {
  :a => 'ka',
  :b => 'zu',
  :c => 'mi',
  :d => 'te',
  :e => 'ku',
  :f => 'lu',
  :g => 'ji',
  :h => 'r',
  :i => 'ki',
  :j => 'zu',
  :k => 'me',
  :l => 'ta',
  :m => 'rin',
  :n => 'to',
  :o => 'mo',
  :p => 'no',
  :q => 'ke',
  :r => 'shi',
  :s => 'ari',
  :t => 'chi',
  :u => 'do',
  :v => 'ru',
  :w => 'mei',
  :x => 'na',
  :y => 'fu',
  :z => 'zi'
}

unless ARGV.empty?
  result = ''
  ARGV.each do |name|
    name.gsub(/[^\w]?\d?_?/i, "").downcase.each_char do |letter|
      result += LETTERS[letter.to_sym]
    end
    result += " "
  end
  puts "Your name #{ARGV.join(" ")} is spelled #{result} in ninja!"
else
  puts "Correct ussage is ruby ninja.rb juan perez"
end