text: module.exports = function toReadable (number) {
  
      if (number == 0) return 'zero';
  
      //array from 0..19
      let smallNumbers = [
        '',
        'one',
        'two',
        'three',
        'four',
        'five',
        'six',
        'seven',
        'eight',
        'nine',
        'ten',
        'eleven',
        'twelve',
        'thirteen',
        'fourteen',
        'fifteen',
        'sixteen',
        'seventeen',
        'eighteen',
        'nineteen'
      ];
      //array from dozens, 20..90
      let bigNumbers = [
        'twenty',
        'thirty',
        'forty',
        'fifty',
        'sixty',
        'seventy',
        'eighty',
        'ninety'
      ];
      //fuction for two-division number
      function dozen(number) {
        let dozens = Math.floor(number / 10);
        let indexOfDozen = dozens - 2;
        let ones = number % 10;
        let indexOfOnes = ones;
        return `${bigNumbers[indexOfDozen]} ${smallNumbers[indexOfOnes]}`;
      }
    
      let numberToHuman = '';
    
      //numbers [0..19]
      if (number >= 0 && number <= 19) {
        numberToHuman = smallNumbers[number];
        return numberToHuman;
      }
      //numbers[20..99]
      if (number >= 20 && number <= 99) {
        numberToHuman = dozen(number).trim();
        return numberToHuman;
      }
      //numbers[100..999]
      if (number >= 100 && number <= 999) {
        let hundreds = Math.floor(number / 100);
        let tailer = number % 100;
        if (tailer <= 19) {
          numberToHuman = (smallNumbers[hundreds].trim() + ' hundred ' + smallNumbers[tailer]).trim();  
        } else {
          let tail = dozen(tailer);
          numberToHuman = (smallNumbers[hundreds].trim() + ' hundred ' + tail.trim()).trim();
        }
        return numberToHuman;
      }
  }
  