# File lib/runt.rb, line 79
    def ordinalize(number)
      if (number.to_i==-1)
        'last'
      elsif (number.to_i==-2)
        'second to last'  
      elsif (11..13).include?(number.to_i % 100)
        "#{number}th"
      else
        case number.to_i % 10
          when 1: "#{number}st"
          when 2: "#{number}nd"
          when 3: "#{number}rd"
          else    "#{number}th"
        end
      end
    end