text: module.exports = function toReadable (number) {
      let predefinedCase = {
          0: "zero",
          1: "one",
          2: "two",
          3: "three",
          4: "four",
          5: "five",
          6: "six",
          7: "seven",
          8: "eight",
          9: "nine",
          10: "ten",
          11: "eleven",
          12: "twelve",
          13: "thirteen",
          14: "fourteen",
          15: "fifteen",
          16: "sixteen",
          17: "seventeen",
          18: "eighteen",
          19: "nineteen",
          20: "twenty",
          30: "thirty",
          40: "forty",
          50: "fifty",
          60: "sixty",
          70: "seventy",
          80: "eighty",
          90: "ninety"
      };
      let strNum = String(number);
      if(predefinedCase[number]) {
          return predefinedCase[number];
      } else if(strNum.length === 2) {
          return predefinedCase[+(strNum[0] + "0") ] + " " + predefinedCase[+strNum[1]];
      } else if(strNum.slice(1) === "00") {
          return predefinedCase[+strNum[0]] + " hundred";
      } else {
          return predefinedCase[+strNum[0]]+ " hundred " + toReadable(+strNum.slice(1));
      }
  }
  