#!/usr/local/ruby

def english_number number
  if number < 0
    return 'Please enter a number that isn\'t negative.'
  end
  if number == 0
    return 'zero'
  end

  num_string = ''

  ones_place = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
  tens_place = ['ten', 'twenty', 'thirty', 'fourty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety']
  teenagers = ['eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen']

  left = number
  write = left/100
  left = left - write*100

  if  write > 0
    hundreds = english_number write
    num_string = num_string + hundreds + ' hundred'
    if left > 0
      num_string = num_string + ' '
    end
  end

  write = left/10
  left = left - write*10

  if write > 0
    if ((write == 1) and (left > 0))
      num_string = num_string + teenagers[left - 1]
      left = 0
    else
      num_string = num_string + tens_place[write - 1]
    end

    if left > 0
      num_string = num_string + '-'
    end
  end

  write = left
  left = 0

  if write > 0
    num_string = num_string + ones_place[write -1]
  end

  num_string
end


puts 'What would you like your number to be?'
n = gets.chomp
puts english_number(n.to_i)