function thunkGenerator(min, max) {
      if (min === void 0) { min = 0; }
      if (max === void 0) { max = 140; }
      var min = Math.max(0, min), max = random.number(min, max), result = produce();
      // append until length is reached
      while (result.length < min) {
          result += produce();
      }
      // cut if needed
      if (result.length > max) {
          result = result.substr(0, max);
      }
      return result;
  }
Generates randomized concatenated string based on words generator.

@returns {string}