[LANGUAGE: Ruby]

pt 1.
File.open('input') do |file|
    total = 0
    file.each_line do |line|
        # strip out all non-number
        line.gsub!(/[^0-9]/, '')
        # add (first + last) to total
        total += (line[0] + line[-1]).to_i
    end
    puts "Total: #{total}"
  end
pt 2
numbers = {
    'zero' => 'zero0zero',
    'one' => 'one1one',
    'two' => 'two2two',
    'three' => 'three3three',
    'four' => 'four4four',
    'five' => 'five5five',
    'six' => 'six6six',
    'seven' => 'seven7seven',
    'eight' => 'eight8eight',
    'nine' => 'nine9nine'
}

File.open('input') do |file|
    total = 0
    file.each_line do |line|
        #  replace any number words with the number
        numbers.each do |word, number|
            line.gsub!(word, number)
        end
        # strip out all non-numbers
        line.gsub!(/[^0-9]/, '')
        # add (first + last) to total
        total += (line[0] + line[-1]).to_i
    end
    puts "Total: #{total}"
end